gps-distance - npm Package Compare versions

Comparing version 0.0.1 to 0.0.2

lib/distance.js

		@@ -7,3 +7,8 @@ var RADIUS = 6371;

		var Distance = function(fromLat, fromLon, toLat, toLon) {
		var getDistance = function(from, to) {
		var fromLat = from[0];
		var fromLon = from[1];
		var toLat = to[0];
		var toLon = to[1];

		var dLat = toRad(toLat - fromLat);
		@@ -21,2 +26,15 @@ var dLon = toRad(toLon - fromLon);

		module.exports = Distance;
		var measurePath = function(points) {
		return points.reduce(function(memo, point) {
		var distance = memo.lastPoint === null ? 0 : getDistance(memo.lastPoint, point);
		return { lastPoint: point, distance: distance + memo.distance };
		}, { lastPoint: null, distance: 0 }).distance;
		};

		module.exports = function(fromLat, fromLon, toLat, toLon) {
		if(typeof fromLat === 'number'){
		return getDistance([fromLat, fromLon], [toLat, toLon]);
		} else {
		return measurePath(fromLat);
		}
		};

package.json

		{
		"name": "gps-distance",
		"version": "0.0.1",
		"version": "0.0.2",
		"description": "Node module for computing distances between GPS coordinates",
		@@ -5,0 +5,0 @@ "private": false,

README.md

		@@ -15,6 +15,26 @@ gps-distance

		var result = distance(45.527517, -122.718766, 45.373373, -121.693604)

		// Between two points:

		var result = distance(45.527517, -122.718766, 45.373373, -121.693604);

		// result is 81.78450202539503

		```

		// Along a path:
		var path = [
		[45.527517, -122.718766],
		[45.373373, -121.693604],
		[45.527517, -122.718766]
		];

		var result2 = distance(path);

		// result2 is 163.56900405079006

		```

		Notes
		-----

		Distances are returned in kilometers and computed using the Haversine formula.

test/test.js

		@@ -12,3 +12,3 @@ 'use strict';

		it('should measure distances correctly', function(done) {
		it('should measure a distance correctly', function(done) {

		@@ -21,4 +21,29 @@ var libResult = distance(45.527517, -122.718766, 45.373373, -121.693604)

		it('should measure the distance of a short path correctly', function(done) {

		var path = [
		[45.527517, -122.718766],
		[45.373373, -121.693604]
		];
		var libResult = distance(path);
		libResult.should.be.approximately(81.784, 0.1);
		done();

		});

		it('should measure the distance of a longer path correctly', function(done) {

		var path = [
		[45.527517, -122.718766],
		[45.373373, -121.693604],
		[45.527517, -122.718766]
		];
		var libResult = distance(path);
		libResult.should.be.approximately(81.784 * 2, 0.1);
		done();

		});

		});

		});

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