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geodist

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Simple geographic distance calculator

cmoncrief/geodist

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assert = require 'assert' geodist = require '../lib/geodist' describe 'Distance', -> it 'should calculate miles between Chicago and Atlanta', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881} assert.equal dist, 587 it 'should calculate miles between Los Angeles and San Francisco', -> dist = geodist {lat: 34.0522, lon: -118.2428}, {lat: 37.7750, lon: -122.4183} assert.equal dist, 347 it 'should calculate miles between Tokyo and Osaka', -> dist = geodist {lat: 35.6833, lon: 139.7667}, {lat: 34.6603, lon: 135.5232} assert.equal dist, 249 it 'should calculate miles between Paris and Berlin', -> dist = geodist {lat: 48.8742, lon: 2.3470}, {lat: 52.5233, lon: 13.4127} assert.equal dist, 545 describe 'Limits', -> it 'should return false if the limit is exceeded', -> dist = geodist {lat: 35.6833, lon: 139.7667}, {lat: 34.6603, lon: 135.5232}, {limit: 200} assert.equal dist, false it 'should return true if the limit is not exceeded', -> dist = geodist {lat: 35.6833, lon: 139.7667}, {lat: 34.6603, lon: 135.5232}, {limit: 250} assert.equal dist, true describe 'Units', -> it 'should calculate miles between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'miles'} assert.equal dist, 11922 it 'should calculate mi between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'mi'} assert.equal dist, 11922 it 'should calculate yards between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'yards'} assert.equal dist, 20983263 it 'should calculate feet between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'feet'} assert.equal dist, 62949789 it 'should calculate km between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'km'} assert.equal dist, 19181 it 'should calculate kilometers between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'kilometers'} assert.equal dist, 19181 it 'should calculate meters between Cordoba and Hamilton', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'meters'} assert.equal dist, 19181067 it 'should calculate in miles when an invalid unit is set', -> dist = geodist {lat: 37.8833, lon: 4.7833}, {lat: -37.7833, lon: 175.2833}, {unit: 'invalid'} assert.equal dist, 11922 describe 'Coordinate formats', -> it 'should support explicit lat/lon coordinate hashes', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881} assert.equal dist, 587 it 'should support arbitrary lat/lon coordinate hashes', -> dist = geodist {x: 41.85, y: -87.65}, {latitude: 33.7489, longitude: -84.3881} assert.equal dist, 587 it 'should support lat/lon coordinate arrays', -> dist = geodist [41.85, -87.65], [33.7489, -84.3881] assert.equal dist, 587 it 'should support mixed coordinate formats', -> dist = geodist {x: 41.85, y: -87.65}, [33.7489, -84.3881] assert.equal dist, 587 describe 'Output options', -> it 'should output whole numbers by default', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881} assert.equal dist, 587 it 'should output decimals when exact option is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {exact: true} assert.equal dist, 587.4338777525531 it 'should output miles string when format option is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true} assert.equal dist, '587 miles' it 'should output mi string when format and km unit is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true, unit: 'mi'} assert.equal dist, '587 mi' it 'should output yards string when format and yards unit is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true, unit: 'yards'} assert.equal dist, '1033883 yards' it 'should output feet string when format and feet unit is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true, unit: 'feet'} assert.equal dist, '3101650 feet' it 'should output km string when format and km unit is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true, unit: 'km'} assert.equal dist, '945 km' it 'should output kilometers string when format and kilometers unit is set', -> dist = geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}, {format: true, unit: 'kilometers'} assert.equal dist, '945 kilometers' describe 'Benchmark', -> it 'should calculate 1 million times in less than 1s', -> @timeout 1000 i = 0 while i++ < 1000000 geodist {lat: 41.85, lon: -87.65}, {lat: 33.7489, lon: -84.3881}