turf-extent - npm Package Compare versions

Comparing version 1.0.0 to 1.0.2

bench.js

@@ -1,11 +0,11 @@
-var extent = require('./');
+global.extent = require('./');
 var Benchmark = require('benchmark');
 var fs = require('fs');
 
-var fc = require('./geojson/FeatureCollection');
-var pt  = require('./geojson/Point');
-var line = require('./geojson/LineString');
-var poly = require('./geojson/Polygon');
-var multiLine = require('./geojson/MultiLineString');
-var multiPoly = require('./geojson/MultiPolygon');
+global.fc = require('./geojson/FeatureCollection');
+global.pt  = require('./geojson/Point');
+global.line = require('./geojson/LineString');
+global.poly = require('./geojson/Polygon');
+global.multiLine = require('./geojson/MultiLineString');
+global.multiPoly = require('./geojson/MultiPolygon');
 
@@ -15,18 +15,18 @@ var suite = new Benchmark.Suite('turf-extent');
   .add('turf-extent#FeatureCollection',function () {
-    extent(fc);
+    global.extent(global.fc);
   })
   .add('turf-extent#Point',function () {
-    extent(pt);
+    global.extent(global.pt);
   })
   .add('turf-extent#LineString',function () {
-    extent(line);
+    global.extent(global.line);
   })
   .add('turf-extent#Polygon',function () {
-    extent(poly);
+    global.extent(global.poly);
   })
   .add('turf-extent#MultiLineString',function () {
-    extent(multiLine);
+    global.extent(global.multiLine);
   })
   .add('turf-extent#MultiPolygon',function () {
-    extent(multiPoly);
+    global.extent(global.multiPoly);
   })
@@ -39,2 +39,2 @@ .on('cycle', function (event) {
   })
-  .run();
+  .run();

index.js

 var flatten = require('flatten');
 
+/**
+ * Calculates the extent of all features and returns a bounding box.
+ *
+ * @alias turf/extent
+ * @param {GeoJSON-Object} input - any valid GeoJSON Object
+ * @return {Array<number>} extent - the bounding box of the GeoJSON given
+ * as an array in WSEN order.
+ * @example
+ * var extent = require('turf-extent')
+ * var fs = require('fs')
+ * var fc = JSON.parse(fs.readFileSync('/path/to/myFeatureCollection.geojson'))
+ * var bbox = extent(fc)
+ * console.log(bbox) // [minX, minY, maxX, maxY]
+ */
 module.exports = function(layer){
-  var xmin = Infinity,
-      ymin = Infinity,
-      xmax = -Infinity,
-      ymax = -Infinity;
-  if(layer.type === 'FeatureCollection'){
-    for(var i in layer.features){
-      var coordinates;
-      switch(layer.features[i].geometry.type){
-        case 'Point':
-          coordinates = [layer.features[i].geometry.coordinates];
-          break
-        case 'LineString':
-          coordinates = layer.features[i].geometry.coordinates;
-          break
-        case 'Polygon':
-          coordinates = layer.features[i].geometry.coordinates;
-          coordinates = flatCoords(coordinates);
-          break
-        case 'MultiPoint':
-          coordinates = layer.features[i].geometry.coordinates;
-          break
-        case 'MultiLineString':
-          coordinates = layer.features[i].geometry.coordinates;
-          coordinates = flatCoords(coordinates);
-          break
-        case 'MultiPolygon':
-          coordinates = layer.features[i].geometry.coordinates;
-          coordinates = flatCoords(coordinates);
-          break
-      }
-      if(!layer.features[i].geometry && layer.features[i].properties){
-        return new Error('Unknown Geometry Type');
-      }
-      
-      for(var n in coordinates){
-        if(xmin > coordinates[n][0]){
-          xmin = coordinates[n][0];
-        }
-        if(ymin > coordinates[n][1]){
-          ymin = coordinates[n][1];
-        }
-        if(xmax < coordinates[n][0]){
-          xmax = coordinates[n][0];
-        }
-        if(ymax < coordinates[n][1]){
-          ymax = coordinates[n][1];
-        }
-      }
-    }
-    var bbox = [xmin, ymin, xmax, ymax]
-    return bbox
-  }
-  else{
-    var coordinates 
-    var geometry
-    if(layer.type === 'Feature'){
-      geometry = layer.geometry
-    }
-    else{
-      geometry = layer
-    }
-    switch(geometry.type){
+  var extent = [Infinity, Infinity, -Infinity, -Infinity];
+
+  var features = [];
+  if (layer.type === 'FeatureCollection') features = layer.features;
+  else if (layer.type === 'Feature') features = [layer];
+  else features = [{ geometry: layer }];
+
+  for(var i = 0; i < features.length; i++){
+    var coords = features[i].geometry.coordinates;
+    switch(features[i].geometry.type){
       case 'Point':
-        coordinates = [geometry.coordinates]
-        break
+        extent0(coords, extent);
+        break;
       case 'LineString':
-        coordinates = geometry.coordinates
-        break
+      case 'MultiPoint':
+        extent1(coords, extent);
+        break;
       case 'Polygon':
-        coordinates = geometry.coordinates
-        coordinates = flatCoords(coordinates)
-        break
-      case 'MultiPoint':
-        coordinates = geometry.coordinates
-        break
       case 'MultiLineString':
-        coordinates = geometry.coordinates
-        coordinates = flatCoords(coordinates)
-        break
+        extent2(coords, extent);
+        break;
       case 'MultiPolygon':
-        coordinates = geometry.coordinates
-        coordinates = flatCoords(coordinates)
-        break
+        extent3(coords, extent);
+        break;
+      default:
+        return new Error('Unknown Geometry Type');
     }
-    if(!geometry){
-      return new Error('No Geometry Found');
+  }
+  return extent;
+};
+
+function extent0(coord, extent) {
+  if(extent[0] > coord[0]) extent[0] = coord[0];
+  if(extent[1] > coord[1]) extent[1] = coord[1];
+  if(extent[2] < coord[0]) extent[2] = coord[0];
+  if(extent[3] < coord[1]) extent[3] = coord[1];
+}
+
+function extent1(coords, extent) {
+  for(var i = 0; i < coords.length; i++){
+    var coord = coords[i];
+    if(extent[0] > coord[0]) extent[0] = coord[0];
+    if(extent[1] > coord[1]) extent[1] = coord[1];
+    if(extent[2] < coord[0]) extent[2] = coord[0];
+    if(extent[3] < coord[1]) extent[3] = coord[1];
+  }
+}
+
+function extent2(coords, extent) {
+  for(var i = 0; i < coords.length; i++){
+    for(var j = 0; j < coords[i].length; j++){
+      var coord = coords[i][j];
+      if(extent[0] > coord[0]) extent[0] = coord[0];
+      if(extent[1] > coord[1]) extent[1] = coord[1];
+      if(extent[2] < coord[0]) extent[2] = coord[0];
+      if(extent[3] < coord[1]) extent[3] = coord[1];
     }
-    
-    for(var n in coordinates){
-      if(xmin > coordinates[n][0]){
-        xmin = coordinates[n][0];
+  }
+}
+
+function extent3(coords, extent) {
+  for(var i = 0; i < coords.length; i++){
+    for(var j = 0; j < coords[i].length; j++){
+      for(var k = 0; k < coords[i][j].length; k++){
+        var coord = coords[i][j][k];
+        if(extent[0] > coord[0]) extent[0] = coord[0];
+        if(extent[1] > coord[1]) extent[1] = coord[1];
+        if(extent[2] < coord[0]) extent[2] = coord[0];
+        if(extent[3] < coord[1]) extent[3] = coord[1];
       }
-      if(ymin > coordinates[n][1]){
-        ymin = coordinates[n][1];
-      }
-      if(xmax < coordinates[n][0]){
-        xmax = coordinates[n][0];
-      }
-      if(ymax < coordinates[n][1]){
-        ymax = coordinates[n][1];
-      }
     }
-    var bbox = [xmin, ymin, xmax, ymax];
-    return bbox;
   }
 }
-
-function flatCoords(coords){
-  var newCoords = [];
-  coords = flatten(coords);
-  coords.forEach(function(c, i){
-    if(i % 2 == 0) // if is even
-      newCoords.push([c, coords[i+1]]);
-  })
-  return newCoords;
-}

package.json

 {
   "name": "turf-extent",
-  "version": "1.0.0",
+  "version": "1.0.2",
   "description": "turf extent module",
@@ -5,0 +5,0 @@ "main": "index.js",

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Total package byte prevSize

11104

decreased by-2.91%

Lines of code

364

decreased by-7.61%

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1

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