geojson-area - npm Package Compare versions

Comparing version 0.2.0 to 0.2.1

index.js

		@@ -56,10 +56,25 @@ var wgs84 = require('wgs84');
		function ringArea(coords) {
		var area = 0;
		var p1, p2, p3, lowerIndex, middleIndex, upperIndex,
		area = 0,
		coordsLength = coords.length;

		if (coords.length > 2) {
		var p1, p2;
		for (var i = 0; i < coords.length - 1; i++) {
		p1 = coords[i];
		p2 = coords[i + 1];
		area += rad(p2[0] - p1[0]) * (2 + Math.sin(rad(p1[1])) + Math.sin(rad(p2[1])));
		if (coordsLength > 2) {
		for (i = 0; i < coordsLength; i++) {
		if (i === coordsLength - 2) {// i = N-2
		lowerIndex = coordsLength - 2;
		middleIndex = coordsLength -1;
		upperIndex = 0;
		} else if (i === coordsLength - 1) {// i = N-1
		lowerIndex = coordsLength - 1;
		middleIndex = 0;
		upperIndex = 1;
		} else { // i = 0 to N-3
		lowerIndex = i;
		middleIndex = i+1;
		upperIndex = i+2;
		}
		p1 = coords[lowerIndex];
		p2 = coords[middleIndex];
		p3 = coords[upperIndex];
		area += ( rad(p3[0]) - rad(p1[0]) ) * Math.sin( rad(p2[1]));
		}
		@@ -75,2 +90,2 @@
		return _ * Math.PI / 180;
		}
		}

package.json

		{
		"name": "geojson-area",
		"version": "0.2.0",
		"version": "0.2.1",
		"description": "calculate the physical area of a geojson geometry",
		@@ -5,0 +5,0 @@ "main": "index.js",

README.md

		@@ -5,3 +5,3 @@ [![Build Status](https://travis-ci.org/mapbox/geojson-area.png)](https://travis-ci.org/mapbox/geojson-area)

		Calculate the area inside of a [GeoJSON](http://geojson.org/) Polygon.
		Calculate the area inside of any [GeoJSON](http://geojson.org/) geometry.

		@@ -24,5 +24,5 @@ ## usage

		Given a Geometry object of type Polygon or MultiPolygon, return contained
		Given a Geometry object, return contained
		area as square meters. Invalid input will return `null`.

		Adapted from [OpenLayers](http://openlayers.org/)

test/basic.js

		@@ -8,3 +8,3 @@ var gjArea = require('../'),
		t.test('computes the area of illinois', function(t) {
		t.equal(gjArea.geometry(ill), 145978332359.37125);
		t.equal(gjArea.geometry(ill), 145978332359.36746);
		t.end();
		@@ -11,0 +11,0 @@ });

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