tilebelt - npm Package Compare versions

Comparing version 0.6.1 to 0.7.0

index.js

		@@ -170,2 +170,17 @@ // a tile is an array [x,y,z]

		function pointToTileFraction (lon, lat, z) {
		var tile = pointToTile(lon, lat, z);
		var bbox = tileToBBOX(tile);

		var xTileOffset = bbox[2] - bbox[0];
		var xPointOffset = lon - bbox[0];
		var xPercentOffset = xPointOffset / xTileOffset;

		var yTileOffset = bbox[1] - bbox[3];
		var yPointOffset = lat - bbox[3];
		var yPercentOffset = yPointOffset / yTileOffset;

		return [tile[0]+xPercentOffset, tile[1]+yPercentOffset, z];
		}

		module.exports = {
		@@ -183,3 +198,4 @@ tileToGeoJSON: tileToGeoJSON,
		pointToTile: pointToTile,
		bboxToTile: bboxToTile
		bboxToTile: bboxToTile,
		pointToTileFraction: pointToTileFraction
		};

package.json

		{
		"name": "tilebelt",
		"version": "0.6.1",
		"version": "0.7.0",
		"description": "simple tile utilities",
		@@ -5,0 +5,0 @@ "main": "index.js",

README.md

		@@ -26,2 +26,3 @@ tilebelt
		tileToGeoJSON(tile) \| get a geojson representation of a tile
		tileToBBOX(tile) \| get the bbox of a tile
		getChildren(tile) \| get the 4 tiles one zoom level higher
		@@ -36,2 +37,3 @@ getParent(tile) \| get the tile one zoom level lower
		pointToTile(lon, lat, zoom) \| get the tile for a point at a specified zoom level
		pointToTileFraction(lon, lat, zoom) \| get the precise fractional tile location for a point at a zoom level

		@@ -38,0 +40,0 @@ ##tests

test.js

		@@ -173,2 +173,11 @@ var test = require('tape'),
		t.end();
		});

		test('pointToTileFraction', function(t) {
		var tile = tilebelt.pointToTileFraction(-95.93965530395508,41.26000108568697,9);
		t.ok(tile, 'convert point to tile fraction');
		t.equal(tile[0], 119.552490234375);
		t.equal(tile[1], 191.4701834281966);
		t.equal(tile[2], 9);
		t.end();
		});

		@@ -26,2 +26,3 @@ tilebelt
		tileToGeoJSON(tile) \| get a geojson representation of a tile
		tileToBBOX(tile) \| get the bbox of a tile
		getChildren(tile) \| get the 4 tiles one zoom level higher
		@@ -36,2 +37,3 @@ getParent(tile) \| get the tile one zoom level lower
		pointToTile(lon, lat, zoom) \| get the tile for a point at a specified zoom level
		pointToTileFraction(lon, lat, zoom) \| get the precise fractional tile location for a point at a zoom level

		@@ -38,0 +40,0 @@ ##tests

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