global-mercator - npm Package Compare versions

Comparing version 0.4.2 to 1.0.0

.vscode/settings.json

 // Place your settings in this file to overwrite default and user settings.
 {
     "editor.tabSize": 2,
+    "typescript.tsdk": "./node_modules/typescript/lib",
     "files.exclude": {
@@ -5,0 +6,0 @@ "**/.git": true,

index.js

 "use strict";
-const Debug = require('debug');
-const lodash_1 = require('lodash');
-exports.debug = {
-    error: Debug('global-mercator:error'),
-    log: Debug('global-mercator:log'),
-    warning: Debug('global-mercator:warning'),
-};
 exports.tileSize = 256;
@@ -13,117 +6,119 @@ exports.initialResolution = 2 * Math.PI * 6378137 / exports.tileSize;
 /**
- * Converts {@link LatLng} coordinates to {@link Meters} coordinates.
+ * Converts {@link LngLat} coordinates to {@link Meters} coordinates.
  *
- * @name latLngToMeters
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
- * @param {number} [zoom] Zoom level
- * @returns {Object} Meters coordinates
+ * @param {number} zoom Zoom level
+ * @returns {Meters} Meters coordinates
  * @example
- * latLngToMeters({lat: 37, lng: 126})
- * //= Meters { mx: 14026255.83995247, my: 4439106.787250587 }
+ * const meters = lngLatToMeters([37, 126, 13])
+ * //=meters
  */
-function latLngToMeters(init) {
-    const { lat, lng, zoom } = new LatLng(init);
+function lngLatToMeters(lnglat) {
+    const [lng, lat, zoom] = lnglat;
     let mx = lng * exports.originShift / 180.0;
     let my = Math.log(Math.tan((90 + lat) * Math.PI / 360.0)) / (Math.PI / 180.0);
     my = my * exports.originShift / 180.0;
-    return new Meters({ mx: mx, my: my, zoom: zoom });
+    return [mx, my, zoom];
 }
-exports.latLngToMeters = latLngToMeters;
+exports.lngLatToMeters = lngLatToMeters;
 /**
- * Converts {@link Meters} coordinates to {@link LatLng} coordinates.
+ * Converts {@link Meters} coordinates to {@link LngLat} coordinates.
  *
- * @name metersToLatLng
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
- * @param {number} [zoom] Zoom level
- * @returns {Object} LatLng coordinates
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
+ * @param {number} zoom Zoom level
+ * @returns {LngLat} LngLat coordinates
  * @example
- * metersToLatLng({ mx: 14026255, my: 4439106 })
- * //= LatLng { lat: 36.99999435205559, lng: 125.99999245457859 }
+ * const lnglat = metersToLngLat([14026255, 4439106, 13])
+ * //=lnglat
  */
-function metersToLatLng(init) {
-    const { mx, my, zoom } = new Meters(init);
+function metersToLngLat(meters) {
+    const [mx, my, zoom] = meters;
     let lng = (mx / exports.originShift) * 180.0;
     let lat = (my / exports.originShift) * 180.0;
     lat = 180 / Math.PI * (2 * Math.atan(Math.exp(lat * Math.PI / 180.0)) - Math.PI / 2.0);
-    return new LatLng({ lat: lat, lng: lng, zoom: zoom });
+    return [lng, lat, zoom];
 }
-exports.metersToLatLng = metersToLatLng;
+exports.metersToLngLat = metersToLngLat;
 /**
  * Converts {@link Meters} coordinates to {@link Pixels} coordinates.
  *
- * @name metersToPixels
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} Pixels coordinates
+ * @returns {Pixels} Pixels coordinates
  * @example
- * metersToPixels({ mx: 14026255, my: 4439106, zoom: 13 })
- * //= Pixels { px: 1782579.1560447346, py: 1280877.3387406059, zoom: 13 }
+ * const pixels = metersToPixels([14026255, 4439106, 13])
+ * //=pixels
  */
-function metersToPixels(init) {
-    const { mx, my, zoom } = new Meters(init);
+function metersToPixels(meters) {
+    const [mx, my, zoom] = meters;
     const res = resolution(zoom);
     const px = (mx + exports.originShift) / res;
     const py = (my + exports.originShift) / res;
-    return new Pixels({ px: px, py: py, zoom: zoom });
+    return [px, py, zoom];
 }
 exports.metersToPixels = metersToPixels;
 /**
- * Converts {@link LatLng} coordinates to TMS {@link Tile}.
+ * Converts {@link LngLat} coordinates to TMS {@link Tile}.
  *
- * @name latLngToTile
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * latLngToTile({lat: 37, lng: 126, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = lngLatToTile([37, 126, 13])
+ * //=tile
  */
-function latLngToTile(init) {
-    const meters = latLngToMeters(init);
+function lngLatToTile(lnglat) {
+    const meters = lngLatToMeters(lnglat);
     const pixels = metersToPixels(meters);
     return pixelsToTile(pixels);
 }
-exports.latLngToTile = latLngToTile;
+exports.lngLatToTile = lngLatToTile;
 /**
- * Converts {@link LatLng} coordinates to {@link Google} (XYZ) Tile.
+ * Converts {@link LngLat} coordinates to {@link Google} (XYZ) Tile.
  *
- * @name latLngToGoogle
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} Google (XYZ) Tile
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * latLngToGoogle({lat: 37, lng: 126, zoom: 13 })
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = lngLatToGoogle({lat: 37, lng: 126, zoom: 13 })
+ * //=google
  */
-function latLngToGoogle(init) {
-    if (init.zoom === 0) {
-        return new Google({ x: 0, y: 0, zoom: 0 });
+function lngLatToGoogle(lnglat) {
+    const zoom = lnglat[2];
+    if (zoom === 0) {
+        return [0, 0, 0];
     }
-    const tile = latLngToTile(init);
-    return tileGoogle(tile);
+    const tile = lngLatToTile(lnglat);
+    return tileToGoogle(tile);
 }
-exports.latLngToGoogle = latLngToGoogle;
+exports.lngLatToGoogle = lngLatToGoogle;
 /**
  * Converts {@link Meters} coordinates to TMS {@link Tile}.
  *
- * @name metersToTile
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * metersToTile({ mx: 14026255, my: 4439106, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = metersToTile([14026255, 4439106, 13])
+ * //=tile
  */
-function metersToTile(init) {
-    if (init.zoom === 0) {
-        return new Tile({ tx: 0, ty: 0, zoom: 0 });
+function metersToTile(meters) {
+    const zoom = meters[2];
+    if (zoom === 0) {
+        return [0, 0, 0];
     }
-    const Pixels = metersToPixels(new Meters(init));
-    return pixelsToTile(Pixels);
+    const pixels = metersToPixels(meters);
+    return pixelsToTile(pixels);
 }
@@ -134,17 +129,17 @@ exports.metersToTile = metersToTile;
  *
- * @name pixelsToMeters
- * @param {number} px Pixels X
- * @param {number} py Pixels Y
+ * @param {Pixels} pixels Pixels [x, y, zoom]
+ * @param {number} x Pixels X
+ * @param {number} y Pixels Y
  * @param {number} zoom Zoom level
- * @returns {Object} Meters coordinates
+ * @returns {Meters} Meters coordinates
  * @example
- * pixelsToMeters({ px: 1782579, py: 1280877, zoom: 13 })
- * //= Meters { mx: 14026252.018101055, my: 4439099.526918683, zoom: 13 }
+ * const meters = pixelsToMeters([1782579, 1280877, 13])
+ * //=meters
  */
-function pixelsToMeters(init) {
-    const { px, py, zoom } = new Pixels(init);
+function pixelsToMeters(pixels) {
+    const [px, py, zoom] = pixels;
     const res = resolution(zoom);
     const mx = px * res - exports.originShift;
     const my = py * res - exports.originShift;
-    return new Meters({ mx: mx, my: my, zoom: zoom });
+    return [mx, my, zoom];
 }
@@ -155,16 +150,16 @@ exports.pixelsToMeters = pixelsToMeters;
  *
- * @name pixelsToTile
+ * @param {Pixels} pixels Pixels [x, y, zoom]
  * @param {number} px Pixels X
  * @param {number} py Pixels Y
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * pixelsToTile({ px: 1782579, py: 1280877, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = pixelsToTile([1782579, 1280877, 13])
+ * //=tile
  */
-function pixelsToTile(init) {
-    if (init.zoom === 0) {
-        return new Tile({ tx: 0, ty: 0, zoom: 0 });
+function pixelsToTile(pixels) {
+    const [px, py, zoom] = pixels;
+    if (zoom === 0) {
+        return [0, 0, 0];
     }
-    const { px, py, zoom } = new Pixels(init);
     let tx = Math.ceil(px / exports.tileSize) - 1;
@@ -178,3 +173,3 @@ let ty = Math.ceil(py / exports.tileSize) - 1;
     }
-    return new Tile({ tx: tx, ty: ty, zoom: zoom });
+    return [tx, ty, zoom];
 }
@@ -185,120 +180,120 @@ exports.pixelsToTile = pixelsToTile;
  *
- * @name tileBbox
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * tileBbox({ tx: 6963, ty: 5003, zoom: 13 })
- * //= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+ * const bbox = tileToBBoxMeters([6963, 5003, 13])
+ * //=bbox
  */
-function tileBbox(init) {
-    const { tx, ty, zoom } = new Tile(init);
-    let min = pixelsToMeters({ px: tx * exports.tileSize, py: ty * exports.tileSize, zoom: zoom });
-    let max = pixelsToMeters({ px: (tx + 1) * exports.tileSize, py: (ty + 1) * exports.tileSize, zoom: zoom });
-    return validateBbox([min.mx, min.my, max.mx, max.my]);
+function tileToBBoxMeters(tile) {
+    const [tx, ty, zoom] = tile;
+    let min = pixelsToMeters([tx * exports.tileSize, ty * exports.tileSize, zoom]);
+    let max = pixelsToMeters([(tx + 1) * exports.tileSize, (ty + 1) * exports.tileSize, zoom]);
+    return [min[0], min[1], max[0], max[1]];
 }
-exports.tileBbox = tileBbox;
+exports.tileToBBoxMeters = tileToBBoxMeters;
 /**
- * Converts TMS {@link Tile} to {@link bbox} in {@link LatLng} coordinates.
+ * Converts TMS {@link Tile} to {@link bbox} in {@link LngLat} coordinates.
  *
- * @name tileLatLngBbox
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * tileLatLngBbox({ tx: 6963, ty: 5003, zoom: 13 })
- * //= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+ * const bbox = tileToBBox([6963, 5003, 13])
+ * //=bbox
  */
-function tileLatLngBbox(init) {
-    if (init.zoom === 0) {
+function tileToBBox(tile) {
+    const [tx, ty, zoom] = tile;
+    if (zoom === 0) {
         return [-180, -85.05112877980659, 180, 85.05112877980659];
     }
-    const { tx, ty, zoom } = new Tile(init);
-    const [mx1, my1, mx2, my2] = tileBbox({ tx: tx, ty: ty, zoom: zoom });
-    const min = metersToLatLng({ mx: mx1, my: my1, zoom: zoom });
-    const max = metersToLatLng({ mx: mx2, my: my2, zoom: zoom });
-    return validateBbox([min.lng, min.lat, max.lng, max.lat]);
+    const [mx1, my1, mx2, my2] = tileToBBoxMeters([tx, ty, zoom]);
+    const min = metersToLngLat([mx1, my1, zoom]);
+    const max = metersToLngLat([mx2, my2, zoom]);
+    return [min[0], min[1], max[0], max[1]];
 }
-exports.tileLatLngBbox = tileLatLngBbox;
+exports.tileToBBox = tileToBBox;
 /**
  * Converts {@link Google} (XYZ) Tile to {@link bbox} in {@link Meters} coordinates.
  *
- * @name googleBbox
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * googleBbox({ x: 6963, y: 3188, zoom: 13 })
- * //= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+ * const bbox = googleToBBoxMeters([6963, 3188, 13])
+ * //=bbox
  */
-function googleBbox(init) {
-    const Tile = googleTile(init);
-    return tileBbox(Tile);
+function googleToBBoxMeters(google) {
+    const Tile = googleToTile(google);
+    return tileToBBoxMeters(Tile);
 }
-exports.googleBbox = googleBbox;
+exports.googleToBBoxMeters = googleToBBoxMeters;
 /**
- * Converts {@link Google} (XYZ) Tile to {@link bbox} in {@link LatLng} coordinates.
+ * Converts {@link Google} (XYZ) Tile to {@link bbox} in {@link LngLat} coordinates.
  *
- * @name googleLatLngBbox
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * googleLatLngBbox({ x: 6963, y: 3188, zoom: 13 })
- * //= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+ * const bbox = googleToBBox([6963, 3188, 13])
+ * //=bbox
  */
-function googleLatLngBbox(init) {
-    const Tile = googleTile(init);
-    return tileLatLngBbox(Tile);
+function googleToBBox(google) {
+    const Tile = googleToTile(google);
+    return tileToBBox(Tile);
 }
-exports.googleLatLngBbox = googleLatLngBbox;
+exports.googleToBBox = googleToBBox;
 /**
  * Converts TMS {@link Tile} to {@link Google} (XYZ) Tile.
  *
- * @name tileGoogle
+ * @param {Tile} tile Tile [x, y, zoom]
  * @param {number} tx TMS Tile X
  * @param {number} ty TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * tileGoogle({ tx: 6963, ty: 5003, zoom: 13 })
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = tileToGoogle([6963, 5003, 13])
+ * //=google
  */
-function tileGoogle(init) {
-    if (init.zoom === 0) {
-        return new Google({ x: 0, y: 0, zoom: 0 });
+function tileToGoogle(tile) {
+    const [tx, ty, zoom] = tile;
+    if (zoom === 0) {
+        return [0, 0, 0];
     }
-    const { tx, ty, zoom } = new Tile(init);
     const x = tx;
     const y = (Math.pow(2, zoom) - 1) - ty;
-    return new Google({ x: x, y: y, zoom: zoom });
+    return [x, y, zoom];
 }
-exports.tileGoogle = tileGoogle;
+exports.tileToGoogle = tileToGoogle;
 /**
  * Converts {@link Google} (XYZ) Tile to TMS {@link Tile}.
  *
- * @name googleTile
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * googleTile({ x: 6963, y: 3188, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = googleToTile([6963, 3188, 13])
+ * //=tile
  */
-function googleTile(init) {
-    const { x, y, zoom } = new Google(init);
+function googleToTile(google) {
+    const [x, y, zoom] = google;
     const tx = x;
     const ty = Math.pow(2, zoom) - y - 1;
-    return new Tile({ tx: tx, ty: ty, zoom: zoom });
+    return [tx, ty, zoom];
 }
-exports.googleTile = googleTile;
+exports.googleToTile = googleToTile;
 /**
  * Converts {@link Google} (XYZ) Tile to {@link Quadkey}.
  *
- * @name googleQuadkey
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
@@ -309,14 +304,14 @@ * @param {number} y Google (XYZ) Tile Y
  * @example
- * googleQuadkey({ x: 6963, y: 3188, zoom: 13 })
- * //= '1321102330211'
+ * const quadkey = googleToQuadkey([6963, 3188, 13])
+ * //=quadkey
  */
-function googleQuadkey(init) {
-    const Tile = googleTile(init);
-    return tileQuadkey(Tile);
+function googleToQuadkey(google) {
+    const Tile = googleToTile(google);
+    return tileToQuadkey(Tile);
 }
-exports.googleQuadkey = googleQuadkey;
+exports.googleToQuadkey = googleToQuadkey;
 /**
  * Converts TMS {@link Tile} to {@link QuadKey}.
  *
- * @name tileQuadkey
+ * @param {Tile} tile Tile [x, y, zoom]
  * @param {number} tx TMS Tile X
@@ -327,14 +322,14 @@ * @param {number} ty TMS Tile Y
  * @example
- * tileQuadkey({ tx: 6963, ty: 5003, zoom: 13 })
- * //= '1321102330211'
+ * const quadkey = tileToQuadkey([6963, 5003, 13])
+ * //=quadkey
  */
-function tileQuadkey(init) {
+function tileToQuadkey(tile) {
+    let [tx, ty, zoom] = tile;
     // Zoom 0 does not exist for Quadkey
-    if (init.zoom === 0) {
+    if (zoom === 0) {
         return '';
     }
-    let { tx, ty, zoom } = new Tile(init);
     let quadkey = '';
     ty = (Math.pow(2, zoom) - 1) - ty;
-    lodash_1.range(zoom, 0, -1).map(i => {
+    range(zoom, 0, -1).map(i => {
         let digit = 0;
@@ -352,33 +347,31 @@ let mask = 1 << (i - 1);
 }
-exports.tileQuadkey = tileQuadkey;
+exports.tileToQuadkey = tileToQuadkey;
 /**
  * Converts {@link Quadkey} to TMS {@link Tile}.
  *
- * @name quadkeyTile
  * @param {string} quadkey Microsoft's Quadkey schema
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * quadkeyTile('1321102330211')
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = quadkeyToTile('1321102330211')
+ * //=tile
  */
-function quadkeyTile(quadkey) {
-    const Google = quadkeyGoogle(quadkey);
-    return googleTile(Google);
+function quadkeyToTile(quadkey) {
+    const Google = quadkeyToGoogle(quadkey);
+    return googleToTile(Google);
 }
-exports.quadkeyTile = quadkeyTile;
+exports.quadkeyToTile = quadkeyToTile;
 /**
  * Converts {@link Quadkey} to {@link Google} (XYZ) Tile.
  *
- * @name quadkeyGoogle
  * @param {string} quadkey Microsoft's Quadkey schema
- * @returns {Object} Google (XYZ) Tile
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * quadkeyGoogle('1321102330211')
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = quadkeyToGoogle('1321102330211')
+ * //=google
  */
-function quadkeyGoogle(quadkey) {
+function quadkeyToGoogle(quadkey) {
     let x = 0;
     let y = 0;
     const zoom = quadkey.length;
-    lodash_1.range(zoom, 0, -1).map(i => {
+    range(zoom, 0, -1).map(i => {
         let mask = 1 << (i - 1);
@@ -402,25 +395,24 @@ switch (parseInt(quadkey[zoom - i], 0)) {
     });
-    return new Google({ x: x, y: y, zoom: zoom });
+    return [x, y, zoom];
 }
-exports.quadkeyGoogle = quadkeyGoogle;
+exports.quadkeyToGoogle = quadkeyToGoogle;
 /**
- * Converts {@link bbox} from {@link LatLng} coordinates to {@link Meters} coordinates
+ * Converts {@link BBox} from {@link LngLat} coordinates to {@link Meters} coordinates
  *
- * @name bboxLatLngToMeters
- * @param {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * bboxLatLngToMeters([ 125, 35, 127, 37 ])
- * //= [ 13914936.349159198, 4163881.1440642904, 14137575.330745745, 4439106.787250587 ]
+ * const meters = bboxToMeters([ 125, 35, 127, 37 ])
+ * //=meters
  */
-function bboxLatLngToMeters(bbox) {
-    const min = latLngToMeters({ lat: bbox[1], lng: bbox[0] });
-    const max = latLngToMeters({ lat: bbox[3], lng: bbox[2] });
-    return [min.mx, min.my, max.mx, max.my];
+function bboxToMeters(bbox) {
+    const zoom = 13;
+    const min = lngLatToMeters([bbox[0], bbox[1], zoom]);
+    const max = lngLatToMeters([bbox[2], bbox[3], zoom]);
+    return [min[0], min[1], max[0], max[1]];
 }
-exports.bboxLatLngToMeters = bboxLatLngToMeters;
+exports.bboxToMeters = bboxToMeters;
 /**
  * Retrieve resolution based on zoom level
  *
- * @name resolution
  * @param {number} zoom zoom level
@@ -433,7 +425,2 @@ * @returns {number} resolution
 function resolution(zoom) {
-    if (lodash_1.isUndefined(zoom)) {
-        const message = '<zoom> is required';
-        exports.debug.error(message);
-        throw new Error(message);
-    }
     return exports.initialResolution / Math.pow(2, zoom);
@@ -445,29 +432,25 @@ }
  *
- * @name validateTile
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @param {string} [name=Tile] - name used for debugging message
  * @throws {Error} Will throw an error if TMS Tile is not valid.
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * validateTile({tx: 60, ty: 80, zoom: 5})
- * //= {tx: 60, ty: 80, zoom: 5}
- * validateTile({tx: 60, ty: -43, zoom: 5})
- * //= Error: Tile <ty> must not be less than 0
+ * validateTile([60, 80, 5])
+ * validateTile([60, -43, 5])
+ * //= Error: Tile <y> must not be less than 0
  */
-function validateTile(init, name = 'Tile') {
-    const { tx, ty, zoom } = init;
-    validateZoom(zoom, 'Tile');
+function validateTile(tile) {
+    const [tx, ty, zoom] = tile;
+    validateZoom(zoom);
     if (tx < 0) {
-        const message = `${name} <tx> must not be less than 0`;
-        exports.debug.error(message);
+        const message = '<x> must not be less than 0';
         throw new Error(message);
     }
     else if (ty < 0) {
-        const message = `${name} <ty> must not be less than 0`;
-        exports.debug.error(message);
+        const message = '<y> must not be less than 0';
         throw new Error(message);
     }
-    return init;
+    return tile;
 }
@@ -478,3 +461,2 @@ exports.validateTile = validateTile;
  *
- * @name validateZoom
  * @param {number} zoom Zoom level
@@ -485,3 +467,2 @@ * @throws {Error} Will throw an error if zoom is not valid.
  * validateZoom(12)
- * //= 12
  * validateZoom(-4)
@@ -492,11 +473,9 @@ * //= Error: <zoom> cannot be less than 0
  */
-function validateZoom(zoom, name) {
+function validateZoom(zoom) {
     if (zoom < 0) {
-        const message = (name) ? `${name} <zoom> cannot be less than 0` : '<zoom> cannot be less than 0';
-        exports.debug.error(message);
+        const message = '<zoom> cannot be less than 0';
         throw new Error(message);
     }
     else if (zoom > 30) {
-        const message = (name) ? `${name} <zoom> cannot be greater than 30` : '<zoom> cannot be greater than 30';
-        exports.debug.error(message);
+        const message = '<zoom> cannot be greater than 30';
         throw new Error(message);
@@ -510,6 +489,8 @@ }
  *
- * @name validatePixels
- * @param {Array<number>} Pixels coordinates
+ * @param {Pixels} pixels Pixels [x, y, zoom]
+ * @param {number} x Pixels X
+ * @param {number} y Pixels Y
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if Pixels is not valid.
- * @returns {Array<number>} Pixels coordinates
+ * @returns {Pixels} Pixels coordinates
  * @example
@@ -519,20 +500,4 @@ * validatePixels([-115, 44])
  */
-function validatePixels(init) {
-    if (init.length < 2 || init.length >= 3) {
-        const message = 'Pixels must be an Array of 2 numbers';
-        exports.debug.error(message);
-        throw new Error(message);
-    }
-    let [px, py] = init;
-    if (px % 1 !== 0) {
-        px = px - px % 1;
-        const message = `Pixels [px] has been modified to ${px}`;
-        exports.debug.warning(message);
-    }
-    if (py % 1 !== 0) {
-        py = py - py % 1;
-        const message = `Pixels [py] has been modified to ${py}`;
-        exports.debug.warning(message);
-    }
-    return [px, py];
+function validatePixels(pixels) {
+    return pixels;
 }
@@ -543,6 +508,8 @@ exports.validatePixels = validatePixels;
  *
- * @name validateMeters
- * @param {Array<number>} Meters coordinates
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if Meters is not valid.
- * @returns {Array<number>} Meters coordinates
+ * @returns {Meters} Meters coordinates
  * @example
@@ -552,59 +519,34 @@ * validateMeters([-115, 44])
  */
-function validateMeters(init) {
-    if (init.length < 2 || init.length >= 3) {
-        const message = 'Meters must be an Array of 2 numbers';
-        exports.debug.error(message);
-        throw new Error(message);
-    }
+function validateMeters(meters) {
+    let [mx, my] = meters;
     const max = 20037508.342789244;
     const min = -20037508.342789244;
-    let [mx, my] = init;
     if (my > max) {
-        const message = `Meters [my] cannot be greater than ${max}`;
-        exports.debug.error(message);
+        const message = `Meters [y] cannot be greater than ${max}`;
         throw new Error(message);
     }
     if (my < min) {
-        const message = `Meters [my] cannot be less than ${min}`;
-        exports.debug.error(message);
+        const message = `Meters [y] cannot be less than ${min}`;
         throw new Error(message);
     }
     if (mx > max) {
-        const message = `Meters [mx] cannot be greater than ${max}`;
-        exports.debug.error(message);
+        const message = `Meters [x] cannot be greater than ${max}`;
         throw new Error(message);
     }
     if (mx < min) {
-        const message = `Meters [mx] cannot be less than ${min}`;
-        exports.debug.error(message);
+        const message = `Meters [x] cannot be less than ${min}`;
         throw new Error(message);
     }
-    return [mx, my];
+    return meters;
 }
 exports.validateMeters = validateMeters;
 /**
- * Validates {@link LatLng} coordinates.
- *
- * @name validateLatLng
- * @param {Array<number>} LatLng coordinates
- * @throws {Error} Will throw an error if LatLng is not valid.
- * @returns {Array<number>} LatLng coordinates
- * @example
- * validateLatLng([60, -125])
- * //= [60, -125]
- * validateLatLng([140, -125])
- * //= Error: LatLng [lat] must be within -90 to 90 degrees
- */
-function validateLatLng(init) {
-    const [lng, lat] = validateLngLat([init[1], init[0]]);
-    return [lat, lng];
-}
-exports.validateLatLng = validateLatLng;
-/**
  * Validates {@link LngLat} coordinates.
  *
- * @name validateLngLat
- * @param {Array<number>} LngLat coordinates
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
+ * @param {number} lat Latitude (Parallels) in decimal degrees
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if LngLat is not valid.
- * @returns {Array<number>} LngLat coordinates
+ * @returns {LngLat} LngLat coordinates
  * @example
@@ -614,201 +556,47 @@ * validateLngLat([-115, 44])
  * validateLngLat([-225, 44])
- * //= Error: LatLng [lng] must be within -180 to 180 degrees
+ * //= Error: LngLat [lng] must be within -180 to 180 degrees
  */
-function validateLngLat(init) {
-    if (init.length < 2 || init.length >= 3) {
-        const message = 'LatLng must be an Array of 2 numbers';
-        exports.debug.error(message);
-        throw new Error(message);
-    }
-    let [lng, lat] = init;
+function validateLngLat(lnglat) {
+    let [lng, lat] = lnglat;
     if (lat < -90 || lat > 90) {
-        const message = 'LatLng [lat] must be within -90 to 90 degrees';
-        exports.debug.error(message);
+        const message = 'LngLat [lat] must be within -90 to 90 degrees';
         throw new Error(message);
     }
     else if (lng < -180 || lng > 180) {
-        const message = 'LatLng [lng] must be within -180 to 180 degrees';
-        exports.debug.error(message);
+        const message = 'LngLat [lng] must be within -180 to 180 degrees';
         throw new Error(message);
     }
-    if (lat > 85) {
-        const message = 'LatLng [lat] has been modified to 85';
-        exports.debug.warning(message);
-        lat = 85;
-    }
-    if (lat < -85) {
-        const message = 'LatLng [lat] has been modified to -85';
-        exports.debug.warning(message);
-        lat = -85;
-    }
-    return [lng, lat];
+    return lnglat;
 }
 exports.validateLngLat = validateLngLat;
 /**
- * Validates {@link bbox}.
+ * Generate an integer Array containing an arithmetic progression.
+ * A port of the native Python `range()` function.
+ * See [the Python documentation](http://docs.python.org/library/functions.html#range).
  *
- * @name validateBbox
- * @param {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
- * @throws {Error} Will throw an error if bbox is not valid.
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @param {number} [start=0] Start
+ * @param {number} stop Stop
+ * @param {number} [step=1] Step
+ * @returns {Array<number>} range
  * @example
- * validateBbox([ -75, 44, -74, 45 ])
- * //= [ -75, 44, -74, 45 ]
- * validateBbox([ -75, 44, -74 ])
- * //= Error: [bbox] must be an Array of 4 numbers
+ * range(20)
+ * range(10, 20)
+ * range(20, 10, -1)
  */
-function validateBbox(init) {
-    if (init.length !== 4) {
-        const message = '[bbox] must be an Array of 4 numbers';
-        exports.debug.error(message);
-        throw new Error(message);
+function range(start, stop, step) {
+    if (stop == null) {
+        stop = start || 0;
+        start = 0;
     }
-    return [...init];
-}
-exports.validateBbox = validateBbox;
-/**
- * Assert undefined items within object.
- *
- * @name assertUndefined
- * @param {Object} items
- * @param {string} [name] - name used for debugging message
- * @throws {Error} Will throw an error if any item in Object is undefined.
- * @returns {Object} items
- * @example
- * assertUndefined({foo: 'bar'})
- * //= {foo: 'bar'}
- * assertUndefined({foo: undefined})
- * //= Error: <foo> is required
- */
-function assertUndefined(items, name) {
-    for (let key of lodash_1.keys(items)) {
-        if (lodash_1.isUndefined(items[key])) {
-            const message = (name) ? `${name} <${key}> is required` : `<${key}> is required`;
-            exports.debug.error(message);
-            throw new Error(message);
-        }
+    if (!step) {
+        step = stop < start ? -1 : 1;
     }
-    return items;
-}
-exports.assertUndefined = assertUndefined;
-/**
- * {@link Google} (XYZ) Tile
- *
- * @class Google
- * @property {number} x Google (XYZ) Tile X
- * @property {number} y Google (XYZ) Tile Y
- * @property {number} zoom Zoom level
- */
-class Google {
-    constructor(init) {
-        const { x, y, zoom } = init;
-        this.x = x;
-        this.y = y;
-        this.zoom = zoom;
-        assertUndefined(this, 'Google');
+    const length = Math.max(Math.ceil((stop - start) / step), 0);
+    const range = Array(length);
+    for (let idx = 0; idx < length; idx++, start += step) {
+        range[idx] = start;
     }
+    return range;
 }
-exports.Google = Google;
-/**
- * TMS {@link Tile}
- *
- * @class Tile
- * @property {number} tx TMS Tile X
- * @property {number} ty TMS Tile Y
- * @property {number} zoom Zoom level
- */
-class Tile {
-    constructor(init) {
-        const { tx, ty, zoom } = init;
-        this.tx = tx;
-        this.ty = ty;
-        this.zoom = zoom;
-        assertUndefined(this, 'Tile');
-        validateTile(this);
-    }
-}
-exports.Tile = Tile;
-/**
- * {@link Pixels} coordinates
- *
- * @class Pixels
- * @property {number} px Pixels X
- * @property {number} py Pixels Y
- * @property {number} zoom Zoom level
- */
-class Pixels {
-    constructor(init) {
-        const { px, py, zoom } = init;
-        this.px = px;
-        this.py = py;
-        if (!lodash_1.isUndefined(zoom)) {
-            this.zoom = zoom;
-        }
-        assertUndefined(this, 'Pixels');
-        validatePixels([px, py]);
-    }
-}
-exports.Pixels = Pixels;
-/**
- * {@link Meters} coordinates
- *
- * @class Meters
- * @property {number} mx Longitudes (Meridians) in meters
- * @property {number} my Latitudes (Parallels) in decimal degrees
- * @property {number} zoom Zoom level
- */
-class Meters {
-    constructor(init) {
-        const { mx, my, zoom } = init;
-        this.mx = mx;
-        this.my = my;
-        if (!lodash_1.isUndefined(zoom)) {
-            this.zoom = zoom;
-        }
-        assertUndefined(this, 'Meters');
-        validateMeters([mx, my]);
-    }
-}
-exports.Meters = Meters;
-/**
- * {@link LatLng} coordinates
- *
- * @class LatLng
- * @property {number} lat Latitude (Parallels) in decimal degrees
- * @property {number} lng Longitude (Meridians) in decimal degrees
- * @property {number} zoom Zoom level
- */
-class LatLng {
-    constructor(init) {
-        const { lng, lat } = init;
-        this.lat = lat;
-        this.lng = lng;
-        if (!lodash_1.isUndefined(init.zoom)) {
-            this.zoom = init.zoom;
-        }
-        assertUndefined(this, 'LatLng');
-        validateLatLng([lat, lng]);
-    }
-}
-exports.LatLng = LatLng;
-/* istanbul ignore next */
-if (require.main === module) {
-    // const bbox = bboxLatLngToMeters([ -75.01464843750001, 44.99588261816546, -74.97070312499999, 45.02695045318546 ])
-    // console.log(bbox)
-    // const meters = pixelsToMeters({ px: 611669, py: 1342753, zoom: 13 })
-    // console.log(meters)
-    // console.log(metersToPixels(meters))
-    // console.log(metersToLatLng(meters))
-    // gdalwarp -of GTiff -te -8581121.501851652 -1353354.7654779512 -8575634.45283096 -1349909.177990999 lima_imagery.mbtiles lima_imagery.tif
-    // console.log(validateLatLng([-120, 45, 1]))
-    // validateMeters([200000, 999150000])
-    // validateMeters([200000, 150000, 1])
-    // validatePixels([200000, 150000, 1])
-    // assertUndefined({x: null})
-    // console.log(metersToLatLng({mx: 10018754.171394622, my: 5621521.486192067}))
-    // console.log(metersToPixels({mx: 10000000, my: 5500000, zoom: 13}))
-    // console.log(metersToPixels({mx: 3000, my: 4000}))
-    console.log(latLngToMeters({ lat: 23, lng: 23 }));
-    console.log(validateBbox([-75, 44, -74]));
-}
+exports.range = range;
 //# sourceMappingURL=index.js.map

index.ts

@@ -1,2 +0,1 @@
-import { range, isUndefined, keys } from 'lodash'
 export const tileSize = 256
@@ -6,67 +5,65 @@ export const initialResolution = 2 * Math.PI * 6378137 / tileSize
 
-export interface InterfaceMeters {
-  mx: number
-  my: number
-  zoom?: number
-}
+/**
+ * LngLat [lng, lat, zoom]
+ */
+export type LngLat = [number, number, number]
+/**
+ * Meters [x, y, zoom]
+ */
+export type Meters = [number, number, number]
+/**
+ * Pixels [x, y, zoom]
+ */
+export type Pixels = [number, number, number]
+/**
+ * BBox extent in [minX, minY, maxX, maxY] order
+ */
+export type BBox = [number, number, number, number]
+/**
+ * Google [x, y, zoom]
+ */
+export type Google = [number, number, number]
+/**
+ * Tile [x, y, zoom]
+ */
+export type Tile = [number, number, number]
+/**
+ * Microsoft's Quadkey schema
+ */
+export type Quadkey = string
 
-export interface InterfacePixels {
-  px: number
-  py: number
-  zoom: number
-}
-
-export interface InterfaceLatLng {
-  lat: number
-  lng: number
-  zoom?: number
-  z?: number
-}
-
-export interface InterfaceGoogle {
-  x: number
-  y: number
-  zoom: number
-}
-
-export interface InterfaceTile {
-  tx: number
-  ty: number
-  zoom: number
-}
-
 /**
- * Converts {@link LatLng} coordinates to {@link Meters} coordinates.
+ * Converts {@link LngLat} coordinates to {@link Meters} coordinates.
  *
- * @name latLngToMeters
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
- * @param {number} [zoom] Zoom level
- * @returns {Object} Meters coordinates
+ * @param {number} zoom Zoom level
+ * @returns {Meters} Meters coordinates
  * @example
- * latLngToMeters({lat: 37, lng: 126})
- * //= Meters { mx: 14026255.83995247, my: 4439106.787250587 }
+ * const meters = lngLatToMeters([37, 126, 13])
+ * //=meters
  */
-export function latLngToMeters(init: InterfaceLatLng) {
-  const { lat, lng, zoom } = new LatLng(init)
+export function lngLatToMeters(lnglat: LngLat): Meters {
+  const [lng, lat, zoom] = lnglat
   let mx: number = lng * originShift / 180.0
   let my: number = Math.log(Math.tan((90 + lat) * Math.PI / 360.0 )) / (Math.PI / 180.0)
   my = my * originShift / 180.0
-  return new Meters({ mx, my, zoom })
+  return [mx, my, zoom]
 }
 
 /**
- * Converts {@link Meters} coordinates to {@link LatLng} coordinates.
+ * Converts {@link Meters} coordinates to {@link LngLat} coordinates.
  *
- * @name metersToLatLng
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
- * @param {number} [zoom] Zoom level
- * @returns {Object} LatLng coordinates
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
+ * @param {number} zoom Zoom level
+ * @returns {LngLat} LngLat coordinates
  * @example
- * metersToLatLng({ mx: 14026255, my: 4439106 })
- * //= LatLng { lat: 36.99999435205559, lng: 125.99999245457859 }
+ * const lnglat = metersToLngLat([14026255, 4439106, 13])
+ * //=lnglat
  */
-export function metersToLatLng(init: InterfaceMeters) {
-  const { mx, my, zoom } = new Meters(init)
+export function metersToLngLat(meters: Meters): LngLat {
+  const [mx, my, zoom] = meters
   let lng = (mx / originShift) * 180.0
@@ -76,3 +73,3 @@ let lat = (my / originShift) * 180.0
 
-  return new LatLng({ lat, lng, zoom })
+  return [lng, lat, zoom]
 }
@@ -83,13 +80,13 @@
  *
- * @name metersToPixels
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} Pixels coordinates
+ * @returns {Pixels} Pixels coordinates
  * @example
- * metersToPixels({ mx: 14026255, my: 4439106, zoom: 13 })
- * //= Pixels { px: 1782579.1560447346, py: 1280877.3387406059, zoom: 13 }
+ * const pixels = metersToPixels([14026255, 4439106, 13])
+ * //=pixels
  */
-export function metersToPixels(init: InterfaceMeters) {
-  const { mx, my, zoom } = new Meters(init)
+export function metersToPixels(meters: Meters): Pixels {
+  const [mx, my, zoom] = meters
   const res = resolution(zoom)
@@ -99,19 +96,19 @@ const px = (mx + originShift) / res
 
-  return new Pixels({ px, py, zoom })
+  return [px, py, zoom]
 }
 
 /**
- * Converts {@link LatLng} coordinates to TMS {@link Tile}.
+ * Converts {@link LngLat} coordinates to TMS {@link Tile}.
  *
- * @name latLngToTile
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * latLngToTile({lat: 37, lng: 126, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = lngLatToTile([37, 126, 13])
+ * //=tile
  */
-export function latLngToTile(init: InterfaceLatLng) {
-  const meters = latLngToMeters(init)
+export function lngLatToTile(lnglat: LngLat): Tile {
+  const meters = lngLatToMeters(lnglat)
   const pixels = metersToPixels(meters)
@@ -122,17 +119,18 @@ return pixelsToTile(pixels)
 /**
- * Converts {@link LatLng} coordinates to {@link Google} (XYZ) Tile.
+ * Converts {@link LngLat} coordinates to {@link Google} (XYZ) Tile.
  *
- * @name latLngToGoogle
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} lat Latitude (Parallels) in decimal degrees
- * @param {number} lng Longitude (Meridians) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} Google (XYZ) Tile
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * latLngToGoogle({lat: 37, lng: 126, zoom: 13 })
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = lngLatToGoogle({lat: 37, lng: 126, zoom: 13 })
+ * //=google
  */
-export function latLngToGoogle(init: InterfaceLatLng) {
-  if (init.zoom === 0) { return new Google({ x: 0, y: 0, zoom: 0 })}
-  const tile = latLngToTile(init)
-  return tileGoogle(tile)
+export function lngLatToGoogle(lnglat: LngLat): Google {
+  const zoom = lnglat[2]
+  if (zoom === 0) { return [0, 0, 0] }
+  const tile = lngLatToTile(lnglat)
+  return tileToGoogle(tile)
 }
@@ -143,15 +141,16 @@
  *
- * @name metersToTile
- * @param {number} mx Longitudes (Meridians) in meters
- * @param {number} my Latitudes (Parallels) in decimal degrees
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * metersToTile({ mx: 14026255, my: 4439106, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = metersToTile([14026255, 4439106, 13])
+ * //=tile
  */
-export function metersToTile(init: InterfaceMeters) {
-  if (init.zoom === 0) { return new Tile({ tx: 0, ty: 0, zoom: 0 })}
-  const Pixels = metersToPixels(new Meters(init))
-  return pixelsToTile(Pixels)
+export function metersToTile(meters: Meters): Tile {
+  const zoom = meters[2]
+  if (zoom === 0) { return [0, 0, 0] }
+  const pixels = metersToPixels(meters)
+  return pixelsToTile(pixels)
 }
@@ -162,13 +161,13 @@
  *
- * @name pixelsToMeters
- * @param {number} px Pixels X
- * @param {number} py Pixels Y
+ * @param {Pixels} pixels Pixels [x, y, zoom]
+ * @param {number} x Pixels X
+ * @param {number} y Pixels Y
  * @param {number} zoom Zoom level
- * @returns {Object} Meters coordinates
+ * @returns {Meters} Meters coordinates
  * @example
- * pixelsToMeters({ px: 1782579, py: 1280877, zoom: 13 })
- * //= Meters { mx: 14026252.018101055, my: 4439099.526918683, zoom: 13 }
+ * const meters = pixelsToMeters([1782579, 1280877, 13])
+ * //=meters
  */
-export function pixelsToMeters(init: InterfacePixels) {
-  const {px, py, zoom} = new Pixels(init)
+export function pixelsToMeters(pixels: Pixels): Meters {
+  const [px, py, zoom] = pixels
   const res = resolution(zoom)
@@ -178,3 +177,3 @@ const mx = px * res - originShift
 
-  return new Meters({ mx, my, zoom })
+  return [mx, my, zoom]
 }
@@ -185,14 +184,14 @@
  *
- * @name pixelsToTile
+ * @param {Pixels} pixels Pixels [x, y, zoom]
  * @param {number} px Pixels X
  * @param {number} py Pixels Y
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * pixelsToTile({ px: 1782579, py: 1280877, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = pixelsToTile([1782579, 1280877, 13])
+ * //=tile
  */
-export function pixelsToTile(init: InterfacePixels) {
-  if (init.zoom === 0) { return new Tile({ tx: 0, ty: 0, zoom: 0 })}
-  const {px, py, zoom} = new Pixels(init)
+export function pixelsToTile(pixels: Pixels): Tile {
+  const [px, py, zoom] = pixels
+  if (zoom === 0) { return [0, 0, 0] }
   let tx = Math.ceil(px / tileSize) - 1
@@ -202,3 +201,3 @@ let ty = Math.ceil(py / tileSize) - 1
   if (ty < 0) { ty = 0 }
-  return new Tile({ tx, ty, zoom })
+  return [tx, ty, zoom]
 }
@@ -209,40 +208,40 @@
  *
- * @name tileBbox
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * tileBbox({ tx: 6963, ty: 5003, zoom: 13 })
- * //= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+ * const bbox = tileToBBoxMeters([6963, 5003, 13])
+ * //=bbox
  */
-export function tileBbox(init: InterfaceTile) {
-  const {tx, ty, zoom} = new Tile(init)
-  let min = pixelsToMeters({ px: tx * tileSize, py: ty * tileSize, zoom })
-  let max = pixelsToMeters({ px: (tx + 1) * tileSize, py: (ty + 1) * tileSize, zoom })
+export function tileToBBoxMeters(tile: Tile): BBox {
+  const [tx, ty, zoom] = tile
+  let min = pixelsToMeters([tx * tileSize, ty * tileSize, zoom])
+  let max = pixelsToMeters([(tx + 1) * tileSize, (ty + 1) * tileSize, zoom])
 
-  return validateBbox([ min.mx, min.my, max.mx, max.my ])
+  return [min[0], min[1], max[0], max[1]]
 }
 
 /**
- * Converts TMS {@link Tile} to {@link bbox} in {@link LatLng} coordinates.
+ * Converts TMS {@link Tile} to {@link bbox} in {@link LngLat} coordinates.
  *
- * @name tileLatLngBbox
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * tileLatLngBbox({ tx: 6963, ty: 5003, zoom: 13 })
- * //= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+ * const bbox = tileToBBox([6963, 5003, 13])
+ * //=bbox
  */
-export function tileLatLngBbox(init: InterfaceTile) {
-  if (init.zoom === 0) { return [ -180, -85.05112877980659, 180, 85.05112877980659 ] }
+export function tileToBBox(tile: Tile): BBox {
+  const [tx, ty, zoom] = tile
+  if (zoom === 0) { return [ -180, -85.05112877980659, 180, 85.05112877980659 ] }
 
-  const {tx, ty, zoom} = new Tile(init)
-  const [mx1, my1, mx2, my2] = tileBbox({ tx, ty, zoom })
-  const min = metersToLatLng({ mx: mx1, my: my1, zoom })
-  const max = metersToLatLng({ mx: mx2, my: my2, zoom })
+  const [mx1, my1, mx2, my2] = tileToBBoxMeters([tx, ty, zoom])
+  const min = metersToLngLat([mx1, my1, zoom])
+  const max = metersToLngLat([mx2, my2, zoom])
 
-  return validateBbox([ min.lng, min.lat, max.lng, max.lat ])
+  return [min[0], min[1], max[0], max[1]]
 }
@@ -253,31 +252,31 @@
  *
- * @name googleBbox
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * googleBbox({ x: 6963, y: 3188, zoom: 13 })
- * //= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+ * const bbox = googleToBBoxMeters([6963, 3188, 13])
+ * //=bbox
  */
-export function googleBbox(init: InterfaceGoogle) {
-  const Tile = googleTile(init)
-  return tileBbox(Tile)
+export function googleToBBoxMeters(google: Google): BBox {
+  const Tile = googleToTile(google)
+  return tileToBBoxMeters(Tile)
 }
 
 /**
- * Converts {@link Google} (XYZ) Tile to {@link bbox} in {@link LatLng} coordinates.
+ * Converts {@link Google} (XYZ) Tile to {@link bbox} in {@link LngLat} coordinates.
  *
- * @name googleLatLngBbox
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * googleLatLngBbox({ x: 6963, y: 3188, zoom: 13 })
- * //= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+ * const bbox = googleToBBox([6963, 3188, 13])
+ * //=bbox
  */
-export function googleLatLngBbox(init: InterfaceGoogle) {
-  const Tile = googleTile(init)
-  return tileLatLngBbox(Tile)
+export function googleToBBox(google: Google): BBox {
+  const Tile = googleToTile(google)
+  return tileToBBox(Tile)
 }
@@ -288,19 +287,19 @@
  *
- * @name tileGoogle
+ * @param {Tile} tile Tile [x, y, zoom]
  * @param {number} tx TMS Tile X
  * @param {number} ty TMS Tile Y
  * @param {number} zoom Zoom level
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * tileGoogle({ tx: 6963, ty: 5003, zoom: 13 })
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = tileToGoogle([6963, 5003, 13])
+ * //=google
  */
-export function tileGoogle(init: InterfaceTile) {
-  if (init.zoom === 0) { return new Google({ x: 0, y: 0, zoom: 0 })}
+export function tileToGoogle(tile: Tile): Google {
+  const [tx, ty, zoom] = tile
+  if (zoom === 0) { return [0, 0, 0] }
 
-  const { tx, ty, zoom } = new Tile(init)
   const x = tx
   const y = (Math.pow(2, zoom) - 1) - ty
 
-  return new Google({ x, y, zoom })
+  return [x, y, zoom]
 }
@@ -311,17 +310,17 @@
  *
- * @name googleTile
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
  * @param {number} y Google (XYZ) Tile Y
  * @param {number} zoom Zoom level
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * googleTile({ x: 6963, y: 3188, zoom: 13 })
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = googleToTile([6963, 3188, 13])
+ * //=tile
  */
-export function googleTile(init: InterfaceGoogle) {
-  const { x, y, zoom } = new Google(init)
+export function googleToTile(google: Google): Tile {
+  const [x, y, zoom] = google
   const tx = x
   const ty = Math.pow(2, zoom) - y - 1
 
-  return new Tile({ tx, ty, zoom })
+  return [tx, ty, zoom]
 }
@@ -332,3 +331,3 @@
  *
- * @name googleQuadkey
+ * @param {Google} google Google [x, y, zoom]
  * @param {number} x Google (XYZ) Tile X
@@ -339,8 +338,8 @@ * @param {number} y Google (XYZ) Tile Y
  * @example
- * googleQuadkey({ x: 6963, y: 3188, zoom: 13 })
- * //= '1321102330211'
+ * const quadkey = googleToQuadkey([6963, 3188, 13])
+ * //=quadkey
  */
-export function googleQuadkey(init: InterfaceGoogle) {
-  const Tile = googleTile(init)
-  return tileQuadkey(Tile)
+export function googleToQuadkey(google: Google): string {
+  const Tile = googleToTile(google)
+  return tileToQuadkey(Tile)
 }
@@ -351,3 +350,3 @@
  *
- * @name tileQuadkey
+ * @param {Tile} tile Tile [x, y, zoom]
  * @param {number} tx TMS Tile X
@@ -358,10 +357,10 @@ * @param {number} ty TMS Tile Y
  * @example
- * tileQuadkey({ tx: 6963, ty: 5003, zoom: 13 })
- * //= '1321102330211'
+ * const quadkey = tileToQuadkey([6963, 5003, 13])
+ * //=quadkey
  */
-export function tileQuadkey(init: InterfaceTile) {
+export function tileToQuadkey(tile: Tile): string {
+  let [tx, ty, zoom] = tile
   // Zoom 0 does not exist for Quadkey
-  if (init.zoom === 0) { return '' }
+  if (zoom === 0) { return '' }
 
-  let { tx, ty, zoom } = new Tile(init)
   let quadkey = ''
@@ -384,12 +383,11 @@
  *
- * @name quadkeyTile
  * @param {string} quadkey Microsoft's Quadkey schema
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * quadkeyTile('1321102330211')
- * //= Tile { tx: 6963, ty: 5003, zoom: 13 }
+ * const tile = quadkeyToTile('1321102330211')
+ * //=tile
  */
-export function quadkeyTile(quadkey: string) {
-  const Google = quadkeyGoogle(quadkey)
-  return googleTile(Google)
+export function quadkeyToTile(quadkey: string): Tile {
+  const Google = quadkeyToGoogle(quadkey)
+  return googleToTile(Google)
 }
@@ -400,10 +398,9 @@
  *
- * @name quadkeyGoogle
  * @param {string} quadkey Microsoft's Quadkey schema
- * @returns {Object} Google (XYZ) Tile
+ * @returns {Google} Google (XYZ) Tile
  * @example
- * quadkeyGoogle('1321102330211')
- * //= Google { x: 6963, y: 3188, zoom: 13 }
+ * const google = quadkeyToGoogle('1321102330211')
+ * //=google
  */
-export function quadkeyGoogle(quadkey: string) {
+export function quadkeyToGoogle(quadkey: string): Google {
   let x: number = 0
@@ -433,19 +430,19 @@ let y: number = 0
   })
-  return new Google({ x, y, zoom })
+  return [x, y, zoom]
 }
 
 /**
- * Converts {@link bbox} from {@link LatLng} coordinates to {@link Meters} coordinates
+ * Converts {@link BBox} from {@link LngLat} coordinates to {@link Meters} coordinates
  *
- * @name bboxLatLngToMeters
- * @param {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+ * @returns {BBox} bbox extent in [minX, minY, maxX, maxY] order
  * @example
- * bboxLatLngToMeters([ 125, 35, 127, 37 ])
- * //= [ 13914936.349159198, 4163881.1440642904, 14137575.330745745, 4439106.787250587 ]
+ * const meters = bboxToMeters([ 125, 35, 127, 37 ])
+ * //=meters
  */
-export function bboxLatLngToMeters(bbox: number[]): number[] {
-  const min = latLngToMeters({lat: bbox[1], lng: bbox[0]})
-  const max = latLngToMeters({lat: bbox[3], lng: bbox[2]})
-  return [min.mx, min.my, max.mx, max.my]
+export function bboxToMeters(bbox: BBox): BBox {
+  const zoom = 13
+  const min = lngLatToMeters([bbox[0], bbox[1], zoom])
+  const max = lngLatToMeters([bbox[2], bbox[3], zoom])
+  return [min[0], min[1], max[0], max[1]]
 }
@@ -456,3 +453,2 @@
  *
- * @name resolution
  * @param {number} zoom zoom level
@@ -464,7 +460,3 @@ * @returns {number} resolution
  */
-export function resolution(zoom: number) {
-    if (isUndefined(zoom)) {
-      const message = '<zoom> is required'
-      throw new Error(message)
-    }
+export function resolution(zoom: number): number {
     return initialResolution / Math.pow(2, zoom)
@@ -476,26 +468,24 @@ }
  *
- * @name validateTile
- * @param {number} tx TMS Tile X
- * @param {number} ty TMS Tile Y
+ * @param {Tile} tile Tile [x, y, zoom]
+ * @param {number} x TMS Tile X
+ * @param {number} y TMS Tile Y
  * @param {number} zoom Zoom level
- * @param {string} [name=Tile] - name used for debugging message
  * @throws {Error} Will throw an error if TMS Tile is not valid.
- * @returns {Object} TMS Tile
+ * @returns {Tile} TMS Tile
  * @example
- * validateTile({tx: 60, ty: 80, zoom: 5})
- * //= {tx: 60, ty: 80, zoom: 5}
- * validateTile({tx: 60, ty: -43, zoom: 5})
- * //= Error: Tile <ty> must not be less than 0
+ * validateTile([60, 80, 5])
+ * validateTile([60, -43, 5])
+ * //= Error: Tile <y> must not be less than 0
  */
-export function validateTile(init: InterfaceTile, name = 'Tile') {
-  const { tx, ty, zoom } = init
-  validateZoom(zoom, 'Tile')
+export function validateTile(tile: Tile): Tile {
+  const [tx, ty, zoom] = tile
+  validateZoom(zoom)
   if (tx < 0) {
-    const message = `${ name } <tx> must not be less than 0`
+    const message = '<x> must not be less than 0'
     throw new Error(message)
   } else if (ty < 0) {
-    const message = `${ name } <ty> must not be less than 0`
+    const message = '<y> must not be less than 0'
     throw new Error(message)
   }
-  return init
+  return tile
 }
@@ -506,3 +496,2 @@
  *
- * @name validateZoom
  * @param {number} zoom Zoom level
@@ -513,3 +502,2 @@ * @throws {Error} Will throw an error if zoom is not valid.
  * validateZoom(12)
- * //= 12
  * validateZoom(-4)
@@ -520,8 +508,8 @@ * //= Error: <zoom> cannot be less than 0
  */
-export function validateZoom(zoom: number, name?: string) {
+export function validateZoom(zoom: number) {
   if (zoom < 0) {
-    const message = (name) ? `${ name } <zoom> cannot be less than 0` : '<zoom> cannot be less than 0'
+    const message = '<zoom> cannot be less than 0'
     throw new Error(message)
   } else if (zoom > 30) {
-    const message = (name) ? `${ name } <zoom> cannot be greater than 30` : '<zoom> cannot be greater than 30'
+    const message = '<zoom> cannot be greater than 30'
     throw new Error(message)
@@ -535,6 +523,8 @@ }
  *
- * @name validatePixels
- * @param {Array<number>} Pixels coordinates
+ * @param {Pixels} pixels Pixels [x, y, zoom]
+ * @param {number} x Pixels X
+ * @param {number} y Pixels Y
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if Pixels is not valid.
- * @returns {Array<number>} Pixels coordinates
+ * @returns {Pixels} Pixels coordinates
  * @example
@@ -544,15 +534,4 @@ * validatePixels([-115, 44])
  */
-export function validatePixels(init: number[]) {
-  if (init.length < 2 || init.length >= 3) {
-    const message = 'Pixels must be an Array of 2 numbers'
-    throw new Error(message)
-  }
-  let [px, py] = init
-  if (px % 1 !== 0) {
-    px = px - px % 1
-  }
-  if (py % 1 !== 0) {
-    py = py - py % 1
-  }
-  return [px, py]
+export function validatePixels(pixels: Pixels): Pixels {
+  return pixels
 }
@@ -563,6 +542,8 @@
  *
- * @name validateMeters
- * @param {Array<number>} Meters coordinates
+ * @param {Meters} meters Meters [x, y, zoom]
+ * @param {number} x Longitudes (Meridians) in meters
+ * @param {number} y Latitudes (Parallels) in decimal degrees
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if Meters is not valid.
- * @returns {Array<number>} Meters coordinates
+ * @returns {Meters} Meters coordinates
  * @example
@@ -572,54 +553,34 @@ * validateMeters([-115, 44])
  */
-export function validateMeters(init: number[]) {
-  if (init.length < 2 || init.length >= 3) {
-    const message = 'Meters must be an Array of 2 numbers'
-    throw new Error(message)
-  }
+export function validateMeters(meters: Meters): Meters {
+  let [mx, my] = meters
   const max = 20037508.342789244
   const min = -20037508.342789244
-  let [mx, my] = init
   if (my > max) {
-    const message = `Meters [my] cannot be greater than ${ max }`
+    const message = `Meters [y] cannot be greater than ${ max }`
     throw new Error(message)
   }
   if (my < min) {
-    const message = `Meters [my] cannot be less than ${ min }`
+    const message = `Meters [y] cannot be less than ${ min }`
     throw new Error(message)
   }
   if (mx > max) {
-    const message = `Meters [mx] cannot be greater than ${ max }`
+    const message = `Meters [x] cannot be greater than ${ max }`
     throw new Error(message)
   }
   if (mx < min) {
-    const message = `Meters [mx] cannot be less than ${ min }`
+    const message = `Meters [x] cannot be less than ${ min }`
     throw new Error(message)
   }
-  return [mx, my]
+  return meters
 }
 
 /**
- * Validates {@link LatLng} coordinates.
- *
- * @name validateLatLng
- * @param {Array<number>} LatLng coordinates
- * @throws {Error} Will throw an error if LatLng is not valid.
- * @returns {Array<number>} LatLng coordinates
- * @example
- * validateLatLng([60, -125])
- * //= [60, -125]
- * validateLatLng([140, -125])
- * //= Error: LatLng [lat] must be within -90 to 90 degrees
- */
-export function validateLatLng(init: number[]) {
-  const [lng, lat] = validateLngLat([init[1], init[0]])
-  return [lat, lng]
-}
-
-/**
  * Validates {@link LngLat} coordinates.
  *
- * @name validateLngLat
- * @param {Array<number>} LngLat coordinates
+ * @param {LngLat} lnglat LngLat [lng, lat, zoom]
+ * @param {number} lng Longitude (Meridians) in decimal degrees
+ * @param {number} lat Latitude (Parallels) in decimal degrees
+ * @param {number} [zoom] Zoom level
  * @throws {Error} Will throw an error if LngLat is not valid.
- * @returns {Array<number>} LngLat coordinates
+ * @returns {LngLat} LngLat coordinates
  * @example
@@ -629,184 +590,46 @@ * validateLngLat([-115, 44])
  * validateLngLat([-225, 44])
- * //= Error: LatLng [lng] must be within -180 to 180 degrees
+ * //= Error: LngLat [lng] must be within -180 to 180 degrees
  */
-export function validateLngLat(init: number[]) {
-  if (init.length < 2 || init.length >= 3) {
-    const message = 'LatLng must be an Array of 2 numbers'
-    throw new Error(message)
-  }
-  let [lng, lat] = init
+export function validateLngLat(lnglat: LngLat): LngLat {
+  let [lng, lat] = lnglat
   if (lat < -90 || lat > 90) {
-    const message = 'LatLng [lat] must be within -90 to 90 degrees'
+    const message = 'LngLat [lat] must be within -90 to 90 degrees'
     throw new Error(message)
   } else if (lng < -180 || lng > 180) {
-    const message = 'LatLng [lng] must be within -180 to 180 degrees'
+    const message = 'LngLat [lng] must be within -180 to 180 degrees'
     throw new Error(message)
   }
-  if (lat > 85) {
-    lat = 85
-  }
-  if (lat < -85) {
-    lat = -85
-  }
-  return [lng, lat]
+  return lnglat
 }
 
 /**
- * Validates {@link bbox}.
+ * Generate an integer Array containing an arithmetic progression.
+ * A port of the native Python `range()` function.
+ * See [the Python documentation](http://docs.python.org/library/functions.html#range).
  *
- * @name validateBbox
- * @param {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
- * @throws {Error} Will throw an error if bbox is not valid.
- * @returns {Array<number>} bbox extent in [minX, minY, maxX, maxY] order
+ * @param {number} [start=0] Start
+ * @param {number} stop Stop
+ * @param {number} [step=1] Step
+ * @returns {Array<number>} range
  * @example
- * validateBbox([ -75, 44, -74, 45 ])
- * //= [ -75, 44, -74, 45 ]
- * validateBbox([ -75, 44, -74 ])
- * //= Error: [bbox] must be an Array of 4 numbers
+ * range(20)
+ * range(10, 20)
+ * range(20, 10, -1)
  */
-export function validateBbox(init: number[]) {
-  if (init.length !== 4) {
-    const message = '[bbox] must be an Array of 4 numbers'
-    throw new Error(message)
+export function range(start: number, stop?: number, step?: number) {
+  if (stop == null) {
+    stop = start || 0
+    start = 0
   }
-  return [...init]
-}
-
-/**
- * Assert undefined items within object.
- *
- * @name assertUndefined
- * @param {Object} items
- * @param {string} [name] - name used for debugging message
- * @throws {Error} Will throw an error if any item in Object is undefined.
- * @returns {Object} items
- * @example
- * assertUndefined({foo: 'bar'})
- * //= {foo: 'bar'}
- * assertUndefined({foo: undefined})
- * //= Error: <foo> is required
- */
-export function assertUndefined(items: any, name?: string) {
-  for (let key of keys(items)) {
-    if (isUndefined(items[key])) {
-      const message = (name) ? `${ name } <${ key }> is required` : `<${ key }> is required`
-      throw new Error(message)
-    }
+  if (!step) {
+    step = stop < start ? -1 : 1
   }
-  return items
-}
 
-/**
- * {@link Google} (XYZ) Tile
- *
- * @class Google
- * @property {number} x Google (XYZ) Tile X
- * @property {number} y Google (XYZ) Tile Y
- * @property {number} zoom Zoom level
- */
-export class Google {
-  public x: number
-  public y: number
-  public zoom: number
-  public z: number
+  const length = Math.max(Math.ceil((stop - start) / step), 0)
+  const range = Array(length)
 
-  constructor(init: InterfaceGoogle) {
-    const {x, y, zoom} = init
-    this.x = x
-    this.y = y
-    this.zoom = zoom
-    assertUndefined(this, 'Google')
+  for (let idx = 0; idx < length; idx++, start += step) {
+    range[idx] = start
   }
+  return range
 }
-
-/**
- * TMS {@link Tile}
- *
- * @class Tile
- * @property {number} tx TMS Tile X
- * @property {number} ty TMS Tile Y
- * @property {number} zoom Zoom level
- */
-export class Tile {
-  public tx: number
-  public ty: number
-  public zoom: number
-
-  constructor(init: InterfaceTile) {
-    const {tx, ty, zoom} = init
-    this.tx = tx
-    this.ty = ty
-    this.zoom = zoom
-    assertUndefined(this, 'Tile')
-    validateTile(this)
-  }
-}
-
-/**
- * {@link Pixels} coordinates
- *
- * @class Pixels
- * @property {number} px Pixels X
- * @property {number} py Pixels Y
- * @property {number} zoom Zoom level
- */
-export class Pixels {
-  public px: number
-  public py: number
-  public zoom: number
-
-  constructor(init: InterfacePixels) {
-    const {px, py, zoom} = init
-    this.px = px
-    this.py = py
-    if (!isUndefined(zoom)) { this.zoom = zoom }
-    assertUndefined(this, 'Pixels')
-    validatePixels([px, py])
-  }
-}
-
-/**
- * {@link Meters} coordinates
- *
- * @class Meters
- * @property {number} mx Longitudes (Meridians) in meters
- * @property {number} my Latitudes (Parallels) in decimal degrees
- * @property {number} zoom Zoom level
- */
-export class Meters {
-  public mx: number
-  public my: number
-  public zoom: number
-
-  constructor(init: InterfaceMeters) {
-    const {mx, my, zoom} = init
-    this.mx = mx
-    this.my = my
-    if (!isUndefined(zoom)) { this.zoom = zoom }
-    assertUndefined(this, 'Meters')
-    validateMeters([mx, my])
-  }
-}
-
-/**
- * {@link LatLng} coordinates
- *
- * @class LatLng
- * @property {number} lat Latitude (Parallels) in decimal degrees
- * @property {number} lng Longitude (Meridians) in decimal degrees
- * @property {number} zoom Zoom level
- */
-export class LatLng {
-  public lat: number
-  public lng: number
-  public zoom: number
-
-  constructor(init: InterfaceLatLng) {
-    const {lng, lat} = init
-    this.lat = lat
-    this.lng = lng
-    if (!isUndefined(init.zoom)) { this.zoom = init.zoom }
-    assertUndefined(this, 'LatLng')
-    validateLatLng([lat, lng])
-  }
-}

package.json

 {
   "name": "global-mercator",
-  "version": "0.4.2",
+  "version": "1.0.0",
   "description": "Global Mercator",
@@ -8,9 +8,10 @@ "main": "index.js",
     "docs": "npm run build && npm run documentation",
-    "documentation": "cat HEADER.md > README.md && documentation build index.js -c documentation.yml -f md >> README.md",
+    "documentation": "cat HEADER.md > README.md && ./node_modules/documentation/bin/documentation.js build index.js -c documentation.yml -f md >> README.md",
     "typings": "./node_modules/typings/dist/bin.js install",
-    "test": "npm run build && npm run ava && npm run lint",
+    "test": "npm run es6 && npm run ava && npm run lint",
+    "es6": "./node_modules/typescript/bin/tsc --target 'es6'",
     "build": "./node_modules/typescript/bin/tsc",
     "ava": "./node_modules/nyc/bin/nyc.js ./node_modules/ava/cli.js",
     "coverage": "./node_modules/nyc/bin/nyc.js ./node_modules/ava/cli.js",
-    "lint": "./node_modules/tslint/bin/tslint index.ts test.ts",
+    "lint": "npm run build && ./node_modules/tslint/bin/tslint index.ts test.ts && ./node_modules/documentation/bin/documentation.js lint index.js",
     "patch": "npm version patch && npm publish"
@@ -31,6 +32,2 @@ },
   "homepage": "https://github.com/DenisCarriere/global-mercator#readme",
-  "dependencies": {
-    "lodash": "^4.16.1",
-    "@types/lodash": "^4.14.36"
-  },
   "devDependencies": {
@@ -37,0 +34,0 @@ "ava": "^0.16.0",

README.md

@@ -28,11 +28,12 @@ [![Build Status](https://travis-ci.org/DenisCarriere/global-mercator.svg?branch=master)](https://travis-ci.org/DenisCarriere/global-mercator)
 
-# latLngToMeters
+# lngLatToMeters
 
-Converts [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
+Converts [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
 
 **Parameters**
 
+-   `lnglat` **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat [lng, lat, zoom]
+-   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
 -   `lat` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitude (Parallels) in decimal degrees
--   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
--   `zoom` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Zoom level
+-   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
 
@@ -42,17 +43,18 @@ **Examples**
 ```javascript
-latLngToMeters({lat: 37, lng: 126})
-//= Meters { mx: 14026255.83995247, my: 4439106.787250587 }
+const meters = lngLatToMeters([37, 126, 13])
+//=meters
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** Meters coordinates
+Returns **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters coordinates
 
-# metersToLatLng
+# metersToLngLat
 
-Converts [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates to [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
+Converts [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates to [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
 
 **Parameters**
 
--   `mx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
--   `my` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
--   `zoom` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Zoom level
+-   `meters` **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
+-   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
 
@@ -62,7 +64,7 @@ **Examples**
 ```javascript
-metersToLatLng({ mx: 14026255, my: 4439106 })
-//= LatLng { lat: 36.99999435205559, lng: 125.99999245457859 }
+const lnglat = metersToLngLat([14026255, 4439106, 13])
+//=lnglat
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** LatLng coordinates
+Returns **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat coordinates
 
@@ -75,4 +77,5 @@ # metersToPixels
 
--   `mx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
--   `my` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
+-   `meters` **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -83,16 +86,17 @@
 ```javascript
-metersToPixels({ mx: 14026255, my: 4439106, zoom: 13 })
-//= Pixels { px: 1782579.1560447346, py: 1280877.3387406059, zoom: 13 }
+const pixels = metersToPixels([14026255, 4439106, 13])
+//=pixels
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** Pixels coordinates
+Returns **[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx)** Pixels coordinates
 
-# latLngToTile
+# lngLatToTile
 
-Converts [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map).
+Converts [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map).
 
 **Parameters**
 
+-   `lnglat` **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat [lng, lat, zoom]
+-   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
 -   `lat` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitude (Parallels) in decimal degrees
--   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -103,16 +107,17 @@
 ```javascript
-latLngToTile({lat: 37, lng: 126, zoom: 13 })
-//= Tile { tx: 6963, ty: 5003, zoom: 13 }
+const tile = lngLatToTile([37, 126, 13])
+//=tile
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
-# latLngToGoogle
+# lngLatToGoogle
 
-Converts [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile.
+Converts [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile.
 
 **Parameters**
 
+-   `lnglat` **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat [lng, lat, zoom]
+-   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
 -   `lat` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitude (Parallels) in decimal degrees
--   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -123,7 +128,7 @@
 ```javascript
-latLngToGoogle({lat: 37, lng: 126, zoom: 13 })
-//= Google { x: 6963, y: 3188, zoom: 13 }
+const google = lngLatToGoogle({lat: 37, lng: 126, zoom: 13 })
+//=google
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** Google (XYZ) Tile
+Returns **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google (XYZ) Tile
 
@@ -136,4 +141,5 @@ # metersToTile
 
--   `mx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
--   `my` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
+-   `meters` **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -144,7 +150,7 @@
 ```javascript
-metersToTile({ mx: 14026255, my: 4439106, zoom: 13 })
-//= Tile { tx: 6963, ty: 5003, zoom: 13 }
+const tile = metersToTile([14026255, 4439106, 13])
+//=tile
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
@@ -157,4 +163,5 @@ # pixelsToMeters
 
--   `px` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels X
--   `py` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels Y
+-   `pixels` **[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx)** Pixels [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels X
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels Y
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -165,7 +172,7 @@
 ```javascript
-pixelsToMeters({ px: 1782579, py: 1280877, zoom: 13 })
-//= Meters { mx: 14026252.018101055, my: 4439099.526918683, zoom: 13 }
+const meters = pixelsToMeters([1782579, 1280877, 13])
+//=meters
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** Meters coordinates
+Returns **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters coordinates
 
@@ -178,2 +185,3 @@ # pixelsToTile
 
+-   `pixels` **[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx)** Pixels [x, y, zoom]
 -   `px` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels X
@@ -186,16 +194,17 @@ -   `py` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels Y
 ```javascript
-pixelsToTile({ px: 1782579, py: 1280877, zoom: 13 })
-//= Tile { tx: 6963, ty: 5003, zoom: 13 }
+const tile = pixelsToTile([1782579, 1280877, 13])
+//=tile
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
-# tileBbox
+# tileToBBoxMeters
 
-Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [bbox](http://geojson.org/geojson-spec.html#bounding-boxes) in [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
+Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [bbox](bbox) in [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
 
 **Parameters**
 
--   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
--   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
+-   `tile` **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** Tile [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -206,16 +215,17 @@
 ```javascript
-tileBbox({ tx: 6963, ty: 5003, zoom: 13 })
-//= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+const bbox = tileToBBoxMeters([6963, 5003, 13])
+//=bbox
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** bbox extent in [minX, minY, maxX, maxY] order
 
-# tileLatLngBbox
+# tileToBBox
 
-Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [bbox](http://geojson.org/geojson-spec.html#bounding-boxes) in [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
+Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [bbox](bbox) in [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
 
 **Parameters**
 
--   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
--   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
+-   `tile` **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** Tile [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
@@ -226,14 +236,15 @@
 ```javascript
-tileLatLngBbox({ tx: 6963, ty: 5003, zoom: 13 })
-//= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+const bbox = tileToBBox([6963, 5003, 13])
+//=bbox
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** bbox extent in [minX, minY, maxX, maxY] order
 
-# googleBbox
+# googleToBBoxMeters
 
-Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to [bbox](http://geojson.org/geojson-spec.html#bounding-boxes) in [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
+Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to [bbox](bbox) in [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates.
 
 **Parameters**
 
+-   `google` **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google [x, y, zoom]
 -   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile X
@@ -246,14 +257,15 @@ -   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile Y
 ```javascript
-googleBbox({ x: 6963, y: 3188, zoom: 13 })
-//= [ 14025277.445990417, 4437016.617897913, 14030169.415800672, 4441908.587708164 ]
+const bbox = googleToBBoxMeters([6963, 3188, 13])
+//=bbox
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** bbox extent in [minX, minY, maxX, maxY] order
 
-# googleLatLngBbox
+# googleToBBox
 
-Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to [bbox](http://geojson.org/geojson-spec.html#bounding-boxes) in [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
+Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to [bbox](bbox) in [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
 
 **Parameters**
 
+-   `google` **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google [x, y, zoom]
 -   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile X
@@ -266,9 +278,9 @@ -   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile Y
 ```javascript
-googleLatLngBbox({ x: 6963, y: 3188, zoom: 13 })
-//= [ 125.99121093749999, 36.98500309285596, 126.03515625, 37.020098201368135 ]
+const bbox = googleToBBox([6963, 3188, 13])
+//=bbox
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** bbox extent in [minX, minY, maxX, maxY] order
 
-# tileGoogle
+# tileToGoogle
 
@@ -279,2 +291,3 @@ Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile.
 
+-   `tile` **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** Tile [x, y, zoom]
 -   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
@@ -287,9 +300,9 @@ -   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
 ```javascript
-tileGoogle({ tx: 6963, ty: 5003, zoom: 13 })
-//= Google { x: 6963, y: 3188, zoom: 13 }
+const google = tileToGoogle([6963, 5003, 13])
+//=google
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google (XYZ) Tile
 
-# googleTile
+# googleToTile
 
@@ -300,2 +313,3 @@ Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map).
 
+-   `google` **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google [x, y, zoom]
 -   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile X
@@ -308,9 +322,9 @@ -   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile Y
 ```javascript
-googleTile({ x: 6963, y: 3188, zoom: 13 })
-//= Tile { tx: 6963, ty: 5003, zoom: 13 }
+const tile = googleToTile([6963, 3188, 13])
+//=tile
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
-# googleQuadkey
+# googleToQuadkey
 
@@ -321,2 +335,3 @@ Converts [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile to [Quadkey](https://msdn.microsoft.com/en-us/library/bb259689.aspx).
 
+-   `google` **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google [x, y, zoom]
 -   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile X
@@ -329,4 +344,4 @@ -   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile Y
 ```javascript
-googleQuadkey({ x: 6963, y: 3188, zoom: 13 })
-//= '1321102330211'
+const quadkey = googleToQuadkey([6963, 3188, 13])
+//=quadkey
 ```
@@ -336,3 +351,3 @@
 
-# tileQuadkey
+# tileToQuadkey
 
@@ -343,2 +358,3 @@ Converts TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map) to [QuadKey](QuadKey).
 
+-   `tile` **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** Tile [x, y, zoom]
 -   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
@@ -351,4 +367,4 @@ -   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
 ```javascript
-tileQuadkey({ tx: 6963, ty: 5003, zoom: 13 })
-//= '1321102330211'
+const quadkey = tileToQuadkey([6963, 5003, 13])
+//=quadkey
 ```
@@ -358,3 +374,3 @@
 
-# quadkeyTile
+# quadkeyToTile
 
@@ -370,9 +386,9 @@ Converts [Quadkey](https://msdn.microsoft.com/en-us/library/bb259689.aspx) to TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map).
 ```javascript
-quadkeyTile('1321102330211')
-//= Tile { tx: 6963, ty: 5003, zoom: 13 }
+const tile = quadkeyToTile('1321102330211')
+//=tile
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
-# quadkeyGoogle
+# quadkeyToGoogle
 
@@ -388,15 +404,15 @@ Converts [Quadkey](https://msdn.microsoft.com/en-us/library/bb259689.aspx) to [Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile.
 ```javascript
-quadkeyGoogle('1321102330211')
-//= Google { x: 6963, y: 3188, zoom: 13 }
+const google = quadkeyToGoogle('1321102330211')
+//=google
 ```
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** Google (XYZ) Tile
+Returns **[Google](https://en.wikipedia.org/wiki/Tiled_web_map)** Google (XYZ) Tile
 
-# bboxLatLngToMeters
+# bboxToMeters
 
-Converts [bbox](http://geojson.org/geojson-spec.html#bounding-boxes) from [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates
+Converts [BBox](http://geojson.org/geojson-spec.html#bounding-boxes) from [LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates to [Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates
 
 **Parameters**
 
--   `bbox` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** extent in [minX, minY, maxX, maxY] order
+-   `bbox` **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** extent in [minX, minY, maxX, maxY] order
 
@@ -406,7 +422,7 @@ **Examples**
 ```javascript
-bboxLatLngToMeters([ 125, 35, 127, 37 ])
-//= [ 13914936.349159198, 4163881.1440642904, 14137575.330745745, 4439106.787250587 ]
+const meters = bboxToMeters([ 125, 35, 127, 37 ])
+//=meters
 ```
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
+Returns **[BBox](http://geojson.org/geojson-spec.html#bounding-boxes)** bbox extent in [minX, minY, maxX, maxY] order
 
@@ -436,6 +452,6 @@ # resolution
 
--   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
--   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
+-   `tile` **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** Tile [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
 -   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
--   `name` **\[[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)]** name used for debugging message (optional, default `Tile`)
 
@@ -445,6 +461,5 @@ **Examples**
 ```javascript
-validateTile({tx: 60, ty: 80, zoom: 5})
-//= {tx: 60, ty: 80, zoom: 5}
-validateTile({tx: 60, ty: -43, zoom: 5})
-//= Error: Tile <ty> must not be less than 0
+validateTile([60, 80, 5])
+validateTile([60, -43, 5])
+//= Error: Tile <y> must not be less than 0
 ```
@@ -454,3 +469,3 @@
 
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** TMS Tile
+Returns **[Tile](https://en.wikipedia.org/wiki/Tiled_web_map)** TMS Tile
 
@@ -469,3 +484,2 @@ # validateZoom
 validateZoom(12)
-//= 12
 validateZoom(-4)
@@ -487,3 +501,6 @@ //= Error: <zoom> cannot be less than 0
 
--   `Pixels` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** coordinates
+-   `pixels` **[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx)** Pixels [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels X
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels Y
+-   `zoom` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Zoom level
 
@@ -499,3 +516,3 @@ **Examples**
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** Pixels coordinates
+Returns **[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx)** Pixels coordinates
 
@@ -508,3 +525,6 @@ # validateMeters
 
--   `Meters` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** coordinates
+-   `meters` **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters [x, y, zoom]
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
+-   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
+-   `zoom` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Zoom level
 
@@ -520,25 +540,4 @@ **Examples**
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** Meters coordinates
+Returns **[Meters](https://en.wikipedia.org/wiki/Web_Mercator)** Meters coordinates
 
-# validateLatLng
-
-Validates [LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates.
-
-**Parameters**
-
--   `LatLng` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** coordinates
-
-**Examples**
-
-```javascript
-validateLatLng([60, -125])
-//= [60, -125]
-validateLatLng([140, -125])
-//= Error: LatLng [lat] must be within -90 to 90 degrees
-```
-
--   Throws **[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error)** Will throw an error if LatLng is not valid.
-
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** LatLng coordinates
-
 # validateLngLat
@@ -550,3 +549,6 @@
 
--   `LngLat` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** coordinates
+-   `lnglat` **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat [lng, lat, zoom]
+-   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
+-   `lat` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitude (Parallels) in decimal degrees
+-   `zoom` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Zoom level
 
@@ -559,3 +561,3 @@ **Examples**
 validateLngLat([-225, 44])
-//= Error: LatLng [lng] must be within -180 to 180 degrees
+//= Error: LngLat [lng] must be within -180 to 180 degrees
 ```
@@ -565,11 +567,15 @@
 
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** LngLat coordinates
+Returns **[LngLat](https://en.wikipedia.org/wiki/World_Geodetic_System)** LngLat coordinates
 
-# validateBbox
+# range
 
-Validates [bbox](http://geojson.org/geojson-spec.html#bounding-boxes).
+Generate an integer Array containing an arithmetic progression.
+A port of the native Python `range()` function.
+See [the Python documentation](http://docs.python.org/library/functions.html#range).
 
 **Parameters**
 
--   `bbox` **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** extent in [minX, minY, maxX, maxY] order
+-   `start` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Start (optional, default `0`)
+-   `stop` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Stop
+-   `step` **\[[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)]** Step (optional, default `1`)
 
@@ -579,82 +585,7 @@ **Examples**
 ```javascript
-validateBbox([ -75, 44, -74, 45 ])
-//= [ -75, 44, -74, 45 ]
-validateBbox([ -75, 44, -74 ])
-//= Error: [bbox] must be an Array of 4 numbers
+range(20)
+range(10, 20)
+range(20, 10, -1)
 ```
 
--   Throws **[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error)** Will throw an error if bbox is not valid.
-
-Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** bbox extent in [minX, minY, maxX, maxY] order
-
-# assertUndefined
-
-Assert undefined items within object.
-
-**Parameters**
-
--   `items` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** 
--   `name` **\[[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)]** name used for debugging message
-
-**Examples**
-
-```javascript
-assertUndefined({foo: 'bar'})
-//= {foo: 'bar'}
-assertUndefined({foo: undefined})
-//= Error: <foo> is required
-```
-
--   Throws **[Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error)** Will throw an error if any item in Object is undefined.
-
-Returns **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** items
-
-# Google
-
-[Google](https://en.wikipedia.org/wiki/Tiled_web_map) (XYZ) Tile
-
-**Properties**
-
--   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile X
--   `y` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Google (XYZ) Tile Y
--   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
-
-# Tile
-
-TMS [Tile](https://en.wikipedia.org/wiki/Tiled_web_map)
-
-**Properties**
-
--   `tx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile X
--   `ty` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** TMS Tile Y
--   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
-
-# Pixels
-
-[Pixels](https://msdn.microsoft.com/en-us/library/bb259689.aspx) coordinates
-
-**Properties**
-
--   `px` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels X
--   `py` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Pixels Y
--   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
-
-# Meters
-
-[Meters](https://en.wikipedia.org/wiki/Web_Mercator) coordinates
-
-**Properties**
-
--   `mx` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitudes (Meridians) in meters
--   `my` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitudes (Parallels) in decimal degrees
--   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
-
-# LatLng
-
-[LatLng](https://en.wikipedia.org/wiki/World_Geodetic_System) coordinates
-
-**Properties**
-
--   `lat` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Latitude (Parallels) in decimal degrees
--   `lng` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Longitude (Meridians) in decimal degrees
--   `zoom` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Zoom level
+Returns **[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)&lt;[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)>** range

test.js

 "use strict";
 const ava_1 = require('ava');
-const lodash_1 = require('lodash');
 const mercator = require('./index');
-const TILE = { tx: 2389, ty: 5245, zoom: 13 };
-const GOOGLE = { x: 2389, y: 2946, zoom: 13 };
+const ZOOM = 13;
+const TILE = [2389, 5245, 13];
+const GOOGLE = [2389, 2946, 13];
 const QUADKEY = '0302321010121';
 const QUADKEY_BAD = '030486861';
-const LATLNG = { lat: 44.99988840247, lng: -75.00005722045897, zoom: 13 };
-const METERS = { mx: -8348968.179247875, my: 5621503.917462073, zoom: 13 };
-const PIXELS = { px: 611669, py: 1342753, zoom: 13 };
-const BBOX = [-8350592.466098936, 5620873.311978721, -8345700.496288682, 5625765.281788976];
-const BBOX_LATLNG = [-75.01464843750001, 44.99588261816546, -74.97070312499999, 45.02695045318546];
-ava_1.default('latLngToMeters', t => {
-    const meters = mercator.latLngToMeters(LATLNG);
-    t.deepEqual(meters.mx.toFixed(2), METERS.mx.toFixed(2));
-    t.deepEqual(meters.my.toFixed(2), METERS.my.toFixed(2));
+const LNGLAT = [-75.00005722045897, 44.99988840247, 13];
+const METERS = [-8348968.179247875, 5621503.917462073, 13];
+const PIXELS = [611669, 1342753, 13];
+const BBOX_METERS = [-8350592.466098936, 5620873.311978721, -8345700.496288682, 5625765.281788976];
+const BBOX = [-75.01464843750001, 44.99588261816546, -74.97070312499999, 45.02695045318546];
+ava_1.default('lngLatToMeters', t => {
+    const meters = mercator.lngLatToMeters(LNGLAT);
+    t.deepEqual(meters[0].toFixed(2), METERS[0].toFixed(2));
+    t.deepEqual(meters[1].toFixed(2), METERS[1].toFixed(2));
 });
-ava_1.default('metersToLatLng', t => {
-    const latlng = mercator.metersToLatLng(METERS);
-    const { lat, lng, zoom } = latlng;
-    t.deepEqual({ lat: lat, lng: lng, zoom: zoom }, LATLNG);
+ava_1.default('metersToLngLat', t => {
+    const lnglat = mercator.metersToLngLat(METERS);
+    t.deepEqual(lnglat, LNGLAT);
 });
 ava_1.default('metersToPixels', t => {
     const pixels = mercator.metersToPixels(METERS);
-    const { px, py, zoom } = pixels;
-    t.deepEqual(px, PIXELS.px);
-    t.deepEqual(py, PIXELS.py);
-    t.deepEqual(zoom, PIXELS.zoom);
+    const [px, py, zoom] = pixels;
+    t.deepEqual(px, PIXELS[0]);
+    t.deepEqual(py, PIXELS[1]);
+    t.deepEqual(zoom, PIXELS[2]);
 });
 ava_1.default('pixelsToTile', t => {
     const tile = mercator.pixelsToTile(PIXELS);
-    t.deepEqual(tile, lodash_1.pick(TILE, ['tx', 'ty', 'zoom']));
+    t.deepEqual(tile, TILE);
 });
 ava_1.default('metersToTile', t => {
     const tile = mercator.metersToTile(METERS);
-    t.deepEqual(tile, lodash_1.pick(TILE, ['tx', 'ty', 'zoom']));
+    t.deepEqual(tile, TILE);
 });
 ava_1.default('pixelsToMeters', t => {
     const meters = mercator.pixelsToMeters(PIXELS);
-    t.deepEqual(meters.mx.toFixed(2), METERS.mx.toFixed(2));
-    t.deepEqual(meters.my.toFixed(2), METERS.my.toFixed(2));
+    t.deepEqual(meters[0].toFixed(2), METERS[0].toFixed(2));
+    t.deepEqual(meters[1].toFixed(2), METERS[1].toFixed(2));
 });
-ava_1.default('tileBbox', t => {
-    const bbox = mercator.tileBbox(TILE);
+ava_1.default('tileToBbox', t => {
+    const bbox = mercator.tileToBBox(TILE);
     t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)));
 });
-ava_1.default('tileLatLngBbox', t => {
-    const bbox = mercator.tileLatLngBbox(TILE);
-    t.deepEqual(bbox, BBOX_LATLNG);
+ava_1.default('tileToBBoxMeters', t => {
+    const bbox = mercator.tileToBBoxMeters(TILE);
+    t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)));
 });
-ava_1.default('tileGoogle', t => {
-    const google = mercator.tileGoogle(TILE);
-    t.deepEqual(google, lodash_1.pick(GOOGLE, ['x', 'y', 'zoom']));
+ava_1.default('tileToGoogle', t => {
+    const google = mercator.tileToGoogle(TILE);
+    t.deepEqual(google, GOOGLE);
 });
-ava_1.default('tileQuadkey', t => {
-    const quadkey = mercator.tileQuadkey(TILE);
+ava_1.default('tileToQuadkey', t => {
+    const quadkey = mercator.tileToQuadkey(TILE);
     t.deepEqual(quadkey, QUADKEY);
 });
-ava_1.default('quadKeyGoogle', t => {
-    const google = mercator.quadkeyGoogle(QUADKEY);
-    t.deepEqual(google, lodash_1.pick(GOOGLE, ['x', 'y', 'zoom']));
+ava_1.default('quadKeyToGoogle', t => {
+    const google = mercator.quadkeyToGoogle(QUADKEY);
+    t.deepEqual(google, GOOGLE);
 });
-ava_1.default('quadKeyTile', t => {
-    const tile = mercator.quadkeyTile(QUADKEY);
-    t.deepEqual(tile, lodash_1.pick(TILE, ['tx', 'ty', 'zoom']));
+ava_1.default('quadKeyToTile', t => {
+    const tile = mercator.quadkeyToTile(QUADKEY);
+    t.deepEqual(tile, TILE);
 });
-ava_1.default('Throws Error quadkeyTile', t => {
-    t.throws(() => mercator.quadkeyTile(QUADKEY_BAD), 'Invalid Quadkey digit sequence');
+ava_1.default('Throws Error quadkeyToTile', t => {
+    t.throws(() => mercator.quadkeyToTile(QUADKEY_BAD), 'Invalid Quadkey digit sequence');
 });
-ava_1.default('googleBbox', t => {
-    const bbox = mercator.googleBbox(GOOGLE);
+ava_1.default('googleToBbox', t => {
+    const bbox = mercator.googleToBBox(GOOGLE);
     t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)));
 });
-ava_1.default('googleLatLonBbox', t => {
-    const bbox = mercator.googleLatLngBbox(GOOGLE);
-    t.deepEqual(bbox, BBOX_LATLNG);
+ava_1.default('googleToBBoxMeters', t => {
+    const bbox = mercator.googleToBBoxMeters(GOOGLE);
+    t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)));
 });
-ava_1.default('latLngToGoogle', t => {
-    const google = mercator.latLngToGoogle(LATLNG);
-    t.deepEqual(google, lodash_1.pick(GOOGLE, ['x', 'y', 'zoom']));
+ava_1.default('lngLatToGoogle', t => {
+    const google = mercator.lngLatToGoogle(LNGLAT);
+    t.deepEqual(google, GOOGLE);
 });
-ava_1.default('googleQuadKey', t => {
-    const quadkey = mercator.googleQuadkey(GOOGLE);
+ava_1.default('googleToQuadKey', t => {
+    const quadkey = mercator.googleToQuadkey(GOOGLE);
     t.deepEqual(quadkey, QUADKEY);
 });
-ava_1.default('Throws Error Bad bbox', t => {
-    t.throws(() => mercator.validateBbox([1]), '[bbox] must be an Array of 4 numbers');
-    t.throws(() => mercator.validateBbox([1, 2]), '[bbox] must be an Array of 4 numbers');
-    t.throws(() => mercator.validateBbox([1, 2, 3]), '[bbox] must be an Array of 4 numbers');
-    t.throws(() => mercator.validateBbox([1, 2, 3, 4, 5]), '[bbox] must be an Array of 4 numbers');
-});
 ava_1.default('Throws Error Bad LngLat', t => {
-    t.throws(() => new mercator.LatLng({ lat: -220, lng: 120 }), 'LatLng [lat] must be within -90 to 90 degrees');
-    t.throws(() => new mercator.LatLng({ lat: 220, lng: 120 }), 'LatLng [lat] must be within -90 to 90 degrees');
-    t.throws(() => new mercator.LatLng({ lat: 45, lng: -220 }), 'LatLng [lng] must be within -180 to 180 degrees');
-    t.throws(() => new mercator.LatLng({ lat: 45, lng: 220 }), 'LatLng [lng] must be within -180 to 180 degrees');
+    t.throws(() => mercator.validateLngLat([-120, 220, ZOOM]), 'LngLat [lat] must be within -90 to 90 degrees');
+    t.throws(() => mercator.validateLngLat([120, 220, ZOOM]), 'LngLat [lat] must be within -90 to 90 degrees');
+    t.throws(() => mercator.validateLngLat([-220, 45, ZOOM]), 'LngLat [lng] must be within -180 to 180 degrees');
+    t.throws(() => mercator.validateLngLat([220, 45, ZOOM]), 'LngLat [lng] must be within -180 to 180 degrees');
 });
-ava_1.default('bboxLatLngToMeters', t => {
-    const bbox = mercator.bboxLatLngToMeters(BBOX_LATLNG);
-    t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)));
+ava_1.default('bboxToMeters', t => {
+    const bbox = mercator.bboxToMeters(BBOX);
+    t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)));
 });
-ava_1.default('googleTile', t => {
-    const tile = mercator.googleTile(GOOGLE);
+ava_1.default('googleToTile', t => {
+    const tile = mercator.googleToTile(GOOGLE);
     t.deepEqual(tile, TILE);
 });
-ava_1.default('latLngToTile', t => {
-    const tile = mercator.latLngToTile(LATLNG);
+ava_1.default('lngLatToTile', t => {
+    const tile = mercator.lngLatToTile(LNGLAT);
     t.deepEqual(tile, TILE);
 });
-ava_1.default('validateLatLng', t => {
-    t.deepEqual(mercator.validateLatLng([85, -120]), [85, -120]);
-});
-ava_1.default('validateLngLat', t => {
-    t.throws(() => mercator.validateLngLat([-120, 45, 1]), 'LatLng must be an Array of 2 numbers');
-    t.throws(() => mercator.validateLngLat([-120, 190]), 'LatLng [lat] must be within -90 to 90 degrees');
-    t.throws(() => mercator.validateLngLat([-220, 45]), 'LatLng [lng] must be within -180 to 180 degrees');
-    t.deepEqual(mercator.validateLngLat([-120, 85.5]), [-120, 85]);
-    t.deepEqual(mercator.validateLngLat([-120, -85.5]), [-120, -85]);
-});
 ava_1.default('validateMeters', t => {
-    t.throws(() => mercator.validateMeters([200000, 150000, 1]), 'Meters must be an Array of 2 numbers');
-    t.throws(() => mercator.validateMeters([200000, 999150000]), 'Meters [my] cannot be greater than 20037508.342789244');
-    t.throws(() => mercator.validateMeters([200000, -999150000]), 'Meters [my] cannot be less than -20037508.342789244');
-    t.throws(() => mercator.validateMeters([999200000, 150000]), 'Meters [mx] cannot be greater than 20037508.342789244');
-    t.throws(() => mercator.validateMeters([-999200000, -150000]), 'Meters [mx] cannot be less than -20037508.342789244');
+    t.throws(() => mercator.validateMeters([200000, 999150000, ZOOM]), 'Meters [y] cannot be greater than 20037508.342789244');
+    t.throws(() => mercator.validateMeters([200000, -999150000, ZOOM]), 'Meters [y] cannot be less than -20037508.342789244');
+    t.throws(() => mercator.validateMeters([999200000, 150000, ZOOM]), 'Meters [x] cannot be greater than 20037508.342789244');
+    t.throws(() => mercator.validateMeters([-999200000, -150000, ZOOM]), 'Meters [x] cannot be less than -20037508.342789244');
+    t.deepEqual(mercator.validateMeters(METERS), METERS);
 });
-ava_1.default('validatePixels', t => {
-    t.throws(() => mercator.validatePixels([200000, 150000, 1]), 'Pixels must be an Array of 2 numbers');
-});
 ava_1.default('validateZoom', t => {
@@ -136,11 +116,20 @@ t.throws(() => mercator.validateZoom(-2), '<zoom> cannot be less than 0');
 ava_1.default('validateTile', t => {
-    t.throws(() => mercator.validateTile({ tx: -10, ty: 30, zoom: 5 }), 'Tile <tx> must not be less than 0');
-    t.throws(() => mercator.validateTile({ tx: 30, ty: -10, zoom: 5 }), 'Tile <ty> must not be less than 0');
+    t.throws(() => mercator.validateTile([-10, 30, 5]), '<x> must not be less than 0');
+    t.throws(() => mercator.validateTile([30, -10, 5]), '<y> must not be less than 0');
+    t.deepEqual(mercator.validateTile(TILE), TILE);
 });
-ava_1.default('validateUndefined', t => {
-    t.throws(() => mercator.assertUndefined({ x: undefined }), '<x> is required');
+ava_1.default('validateLngLat', t => {
+    t.deepEqual(mercator.validateLngLat(LNGLAT), LNGLAT);
 });
-ava_1.default('metersToPixels missing zoom', t => {
-    t.throws(() => mercator.metersToPixels({ mx: -8348968.179247875, my: 5621503.917462073 }), '<zoom> is required');
+ava_1.default('validatePixels', t => {
+    t.deepEqual(mercator.validatePixels(PIXELS), PIXELS);
 });
+ava_1.default('resolution', t => {
+    t.deepEqual(mercator.resolution(ZOOM), 19.109257071294063);
+});
+ava_1.default('range', t => {
+    t.deepEqual(mercator.range(3), [0, 1, 2]);
+    t.deepEqual(mercator.range(0, 3), [0, 1, 2]);
+    t.deepEqual(mercator.range(3, 0, -1), [3, 2, 1]);
+});
 //# sourceMappingURL=test.js.map

test.ts

 import test from 'ava'
-import { pick } from 'lodash'
 import * as mercator from './index'
 
-const TILE = { tx: 2389, ty: 5245, zoom: 13 }
-const GOOGLE = { x: 2389, y: 2946, zoom: 13 }
+const ZOOM = 13
+const TILE: mercator.Tile = [2389, 5245, 13]
+const GOOGLE: mercator.Google = [2389, 2946, 13]
 const QUADKEY = '0302321010121'
 const QUADKEY_BAD = '030486861'
-const LATLNG = { lat: 44.99988840247, lng: -75.00005722045897, zoom: 13 }
-const METERS = { mx: -8348968.179247875, my: 5621503.917462073, zoom: 13 }
-const PIXELS = { px: 611669, py: 1342753, zoom: 13 }
-const BBOX = [ -8350592.466098936, 5620873.311978721, -8345700.496288682, 5625765.281788976 ]
-const BBOX_LATLNG = [ -75.01464843750001, 44.99588261816546, -74.97070312499999, 45.02695045318546 ]
+const LNGLAT: mercator.LngLat = [-75.00005722045897, 44.99988840247, 13]
+const METERS: mercator.Meters = [-8348968.179247875, 5621503.917462073, 13]
+const PIXELS: mercator.Pixels = [611669, 1342753, 13]
+const BBOX_METERS: mercator.BBox = [-8350592.466098936, 5620873.311978721, -8345700.496288682, 5625765.281788976]
+const BBOX: mercator.BBox = [-75.01464843750001, 44.99588261816546, -74.97070312499999, 45.02695045318546]
 
-test('latLngToMeters', t => {
-  const meters = mercator.latLngToMeters(LATLNG)
-  t.deepEqual(meters.mx.toFixed(2), METERS.mx.toFixed(2))
-  t.deepEqual(meters.my.toFixed(2), METERS.my.toFixed(2))
+test('lngLatToMeters', t => {
+  const meters = mercator.lngLatToMeters(LNGLAT)
+  t.deepEqual(meters[0].toFixed(2), METERS[0].toFixed(2))
+  t.deepEqual(meters[1].toFixed(2), METERS[1].toFixed(2))
 })
 
-test('metersToLatLng', t => {
-  const latlng = mercator.metersToLatLng(METERS)
-  const { lat, lng, zoom } = latlng
-  t.deepEqual({lat, lng, zoom}, LATLNG)
+test('metersToLngLat', t => {
+  const lnglat = mercator.metersToLngLat(METERS)
+  t.deepEqual(lnglat, LNGLAT)
 })
@@ -29,6 +28,6 @@
   const pixels = mercator.metersToPixels(METERS)
-  const { px, py, zoom } = pixels
-  t.deepEqual(px, PIXELS.px)
-  t.deepEqual(py, PIXELS.py)
-  t.deepEqual(zoom, PIXELS.zoom)
+  const [px, py, zoom] = pixels
+  t.deepEqual(px, PIXELS[0])
+  t.deepEqual(py, PIXELS[1])
+  t.deepEqual(zoom, PIXELS[2])
 })
@@ -38,3 +37,3 @@
   const tile = mercator.pixelsToTile(PIXELS)
-  t.deepEqual(tile, pick(TILE, ['tx', 'ty', 'zoom']))
+  t.deepEqual(tile, TILE)
 })
@@ -44,3 +43,3 @@
   const tile = mercator.metersToTile(METERS)
-  t.deepEqual(tile, pick(TILE, ['tx', 'ty', 'zoom']))
+  t.deepEqual(tile, TILE)
 })
@@ -50,113 +49,90 @@
   const meters = mercator.pixelsToMeters(PIXELS)
-  t.deepEqual(meters.mx.toFixed(2), METERS.mx.toFixed(2))
-  t.deepEqual(meters.my.toFixed(2), METERS.my.toFixed(2))
+  t.deepEqual(meters[0].toFixed(2), METERS[0].toFixed(2))
+  t.deepEqual(meters[1].toFixed(2), METERS[1].toFixed(2))
 })
 
-test('tileBbox', t => {
-  const bbox = mercator.tileBbox(TILE)
+test('tileToBbox', t => {
+  const bbox = mercator.tileToBBox(TILE)
   t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)))
 })
 
-test('tileLatLngBbox', t => {
-  const bbox = mercator.tileLatLngBbox(TILE)
-  t.deepEqual(bbox, BBOX_LATLNG)
+test('tileToBBoxMeters', t => {
+  const bbox = mercator.tileToBBoxMeters(TILE)
+  t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)))
 })
 
-test('tileGoogle', t => {
-  const google = mercator.tileGoogle(TILE)
-  t.deepEqual(google, pick(GOOGLE, ['x', 'y', 'zoom']))
+test('tileToGoogle', t => {
+  const google = mercator.tileToGoogle(TILE)
+  t.deepEqual(google, GOOGLE)
 })
 
-test('tileQuadkey', t => {
-  const quadkey = mercator.tileQuadkey(TILE)
+test('tileToQuadkey', t => {
+  const quadkey = mercator.tileToQuadkey(TILE)
   t.deepEqual(quadkey, QUADKEY)
 })
 
-test('quadKeyGoogle', t => {
-  const google = mercator.quadkeyGoogle(QUADKEY)
-  t.deepEqual(google, pick(GOOGLE, ['x', 'y', 'zoom']))
+test('quadKeyToGoogle', t => {
+  const google = mercator.quadkeyToGoogle(QUADKEY)
+  t.deepEqual(google, GOOGLE)
 })
 
-test('quadKeyTile', t => {
-  const tile = mercator.quadkeyTile(QUADKEY)
-  t.deepEqual(tile, pick(TILE, ['tx', 'ty', 'zoom']))
+test('quadKeyToTile', t => {
+  const tile = mercator.quadkeyToTile(QUADKEY)
+  t.deepEqual(tile, TILE)
 })
 
-test('Throws Error quadkeyTile', t => {
-  t.throws(() => mercator.quadkeyTile(QUADKEY_BAD), 'Invalid Quadkey digit sequence')
+test('Throws Error quadkeyToTile', t => {
+  t.throws(() => mercator.quadkeyToTile(QUADKEY_BAD), 'Invalid Quadkey digit sequence')
 })
 
-test('googleBbox', t => {
-  const bbox = mercator.googleBbox(GOOGLE)
+test('googleToBbox', t => {
+  const bbox = mercator.googleToBBox(GOOGLE)
   t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)))
 })
 
-test('googleLatLonBbox', t => {
-  const bbox = mercator.googleLatLngBbox(GOOGLE)
-  t.deepEqual(bbox, BBOX_LATLNG)
+test('googleToBBoxMeters', t => {
+  const bbox = mercator.googleToBBoxMeters(GOOGLE)
+  t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)))
 })
 
-test('latLngToGoogle', t => {
-  const google = mercator.latLngToGoogle(LATLNG)
-  t.deepEqual(google, pick(GOOGLE, ['x', 'y', 'zoom']))
+test('lngLatToGoogle', t => {
+  const google = mercator.lngLatToGoogle(LNGLAT)
+  t.deepEqual(google, GOOGLE)
 })
 
-test('googleQuadKey', t => {
-  const quadkey = mercator.googleQuadkey(GOOGLE)
+test('googleToQuadKey', t => {
+  const quadkey = mercator.googleToQuadkey(GOOGLE)
   t.deepEqual(quadkey, QUADKEY)
 })
 
-test('Throws Error Bad bbox', t => {
-  t.throws(() => mercator.validateBbox([1]), '[bbox] must be an Array of 4 numbers')
-  t.throws(() => mercator.validateBbox([1, 2]), '[bbox] must be an Array of 4 numbers')
-  t.throws(() => mercator.validateBbox([1, 2, 3]), '[bbox] must be an Array of 4 numbers')
-  t.throws(() => mercator.validateBbox([1, 2, 3, 4, 5]), '[bbox] must be an Array of 4 numbers')
-})
-
 test('Throws Error Bad LngLat', t => {
-  t.throws(() => new mercator.LatLng({ lat: -220, lng: 120 }), 'LatLng [lat] must be within -90 to 90 degrees')
-  t.throws(() => new mercator.LatLng({ lat: 220, lng: 120 }), 'LatLng [lat] must be within -90 to 90 degrees')
-  t.throws(() => new mercator.LatLng({ lat: 45, lng: -220 }), 'LatLng [lng] must be within -180 to 180 degrees')
-  t.throws(() => new mercator.LatLng({ lat: 45, lng: 220 }), 'LatLng [lng] must be within -180 to 180 degrees')
+  t.throws(() => mercator.validateLngLat([-120, 220, ZOOM]), 'LngLat [lat] must be within -90 to 90 degrees')
+  t.throws(() => mercator.validateLngLat([120, 220, ZOOM]), 'LngLat [lat] must be within -90 to 90 degrees')
+  t.throws(() => mercator.validateLngLat([-220, 45, ZOOM]), 'LngLat [lng] must be within -180 to 180 degrees')
+  t.throws(() => mercator.validateLngLat([220, 45, ZOOM]), 'LngLat [lng] must be within -180 to 180 degrees')
 })
 
-test('bboxLatLngToMeters', t => {
-  const bbox = mercator.bboxLatLngToMeters(BBOX_LATLNG)
-  t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX.map(i => i.toFixed(2)))
+test('bboxToMeters', t => {
+  const bbox = mercator.bboxToMeters(BBOX)
+  t.deepEqual(bbox.map(i => i.toFixed(2)), BBOX_METERS.map(i => i.toFixed(2)))
 })
 
-test('googleTile', t => {
-  const tile = mercator.googleTile(GOOGLE)
+test('googleToTile', t => {
+  const tile = mercator.googleToTile(GOOGLE)
   t.deepEqual(tile, TILE)
 })
 
-test('latLngToTile', t => {
-  const tile = mercator.latLngToTile(LATLNG)
+test('lngLatToTile', t => {
+  const tile = mercator.lngLatToTile(LNGLAT)
   t.deepEqual(tile, TILE)
 })
 
-test('validateLatLng', t => {
-  t.deepEqual(mercator.validateLatLng([85, -120]), [85, -120])
-})
-
-test('validateLngLat', t => {
-  t.throws(() => mercator.validateLngLat([-120, 45, 1]), 'LatLng must be an Array of 2 numbers')
-  t.throws(() => mercator.validateLngLat([-120, 190]), 'LatLng [lat] must be within -90 to 90 degrees')
-  t.throws(() => mercator.validateLngLat([-220, 45]), 'LatLng [lng] must be within -180 to 180 degrees')
-  t.deepEqual(mercator.validateLngLat([-120, 85.5]), [-120, 85])
-  t.deepEqual(mercator.validateLngLat([-120, -85.5]), [-120, -85])
-})
-
 test('validateMeters', t => {
-  t.throws(() => mercator.validateMeters([200000, 150000, 1]), 'Meters must be an Array of 2 numbers')
-  t.throws(() => mercator.validateMeters([200000, 999150000]), 'Meters [my] cannot be greater than 20037508.342789244')
-  t.throws(() => mercator.validateMeters([200000, -999150000]), 'Meters [my] cannot be less than -20037508.342789244')
-  t.throws(() => mercator.validateMeters([999200000, 150000]), 'Meters [mx] cannot be greater than 20037508.342789244')
-  t.throws(() => mercator.validateMeters([-999200000, -150000]), 'Meters [mx] cannot be less than -20037508.342789244')
+  t.throws(() => mercator.validateMeters([200000, 999150000, ZOOM]), 'Meters [y] cannot be greater than 20037508.342789244')
+  t.throws(() => mercator.validateMeters([200000, -999150000, ZOOM]), 'Meters [y] cannot be less than -20037508.342789244')
+  t.throws(() => mercator.validateMeters([999200000, 150000, ZOOM]), 'Meters [x] cannot be greater than 20037508.342789244')
+  t.throws(() => mercator.validateMeters([-999200000, -150000, ZOOM]), 'Meters [x] cannot be less than -20037508.342789244')
+  t.deepEqual(mercator.validateMeters(METERS), METERS)
 })
 
-test('validatePixels', t => {
-  t.throws(() => mercator.validatePixels([200000, 150000, 1]), 'Pixels must be an Array of 2 numbers')
-})
-
 test('validateZoom', t => {
@@ -168,12 +144,23 @@ t.throws(() => mercator.validateZoom(-2), '<zoom> cannot be less than 0')
 test('validateTile', t => {
-  t.throws(() => mercator.validateTile({tx: -10, ty: 30, zoom: 5}), 'Tile <tx> must not be less than 0')
-  t.throws(() => mercator.validateTile({tx: 30, ty: -10, zoom: 5}), 'Tile <ty> must not be less than 0')
+  t.throws(() => mercator.validateTile([-10, 30, 5]), '<x> must not be less than 0')
+  t.throws(() => mercator.validateTile([30, -10, 5]), '<y> must not be less than 0')
+  t.deepEqual(mercator.validateTile(TILE), TILE)
 })
 
-test('validateUndefined', t => {
-  t.throws(() => mercator.assertUndefined({x: undefined}), '<x> is required')
+test('validateLngLat', t => {
+  t.deepEqual(mercator.validateLngLat(LNGLAT), LNGLAT)
 })
 
-test('metersToPixels missing zoom', t => {
-  t.throws(() => mercator.metersToPixels({ mx: -8348968.179247875, my: 5621503.917462073}), '<zoom> is required')
+test('validatePixels', t => {
+  t.deepEqual(mercator.validatePixels(PIXELS), PIXELS)
 })
+
+test('resolution', t => {
+  t.deepEqual(mercator.resolution(ZOOM), 19.109257071294063)
+})
+
+test('range', t => {
+  t.deepEqual(mercator.range(3), [0, 1, 2])
+  t.deepEqual(mercator.range(0, 3), [0, 1, 2])
+  t.deepEqual(mercator.range(3, 0, -1), [3, 2, 1])
+})

tsconfig.json

@@ -5,3 +5,3 @@ {
         "module": "commonjs",
-        "target": "ES5",
+        "target": "ES6",
         "noImplicitAny": true,
@@ -17,5 +17,4 @@ "removeComments": false,
     "filesGlob": [
-        "./**/*.ts",
-        "typings/index.d.ts"
+        "./**/*.ts"
     ]
 }

New alerts

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Fixed alerts

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Improved metrics

Dependency count

0

decreased by-100%

Number of low quality alerts

0

decreased by-100%

Worsened metrics

Total package byte prevSize

118559

decreased by-24.76%

Number of package files

18

decreased by-5.26%

Lines of code

1469

decreased by-21.32%

Number of lines in readme file

550

decreased by-11.15%

Number of medium supply chain risk alerts

1

increased byInfinity%

Dependency changes

• - Removed@types/lodash@^4.14.36

• - Removedlodash@^4.16.1

• - Removed@types/lodash@4.17.14(transitive)

• - Removedlodash@4.17.21(transitive)