https://github.com/TankofVines/node-vincenty

Repacked some vanilla JS that calculates metric distance between two latitude and longitude coordinates
https://github.com/TankofVines/node-vincenty

Last synced: 4 months ago
JSON representation

Repacked some vanilla JS that calculates metric distance between two latitude and longitude coordinates

• Host: GitHub
• URL: https://github.com/TankofVines/node-vincenty
• Owner: TankofVines
• Created: 2013-01-24T20:44:36.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2015-03-31T20:42:11.000Z (over 9 years ago)
• Last Synced: 2024-08-14T04:28:25.780Z (4 months ago)
• Language: JavaScript
• Size: 160 KB
• Stars: 22
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
node-vincenty

=============

Repackaged some vanilla js that calculates metric distance between two latitude and longitude coordinates based on Chris Veness' script here:

http://www.movable-type.co.uk/scripts/latlong-vincenty.html

http://www.movable-type.co.uk/scripts/latlong-vincenty-direct.html

The module exports two functions:

    distVincenty(lat1, long1, lat2, long2, callback) which accepts four parameters representing the latitude and longitude of the input coordinates.

    destVincenty(lat1, lon1, brng, dist) which calculates the destination point given the starting latitude and longitude with a given bearing and distance

Install:

    npm install node-vincenty

Usage:

    var vincenty = require('node-vincenty');

Examples:

    // these are synchronous

    console.log( vincenty.distVincenty(30.5, -100.6, 31.7, -101.8) );

    console.log( vincenty.destVincenty(30.5, -100.6, 175518.816, -40.4035) );

    // these are asynchronous

    vincenty.distVincenty(30.5, -100.6, 31.7, -101.8, function (distance) {

        console.log(distance);

    });

    vincenty.distVincenty(30.5, -100.6, 31.7, -101.8, function (distance, initialBearing, finalBearing) {

        console.log(distance, initialBearing, finalBearing);

    });

    vincenty.destVincenty(30.5, -100.6, 175518.816, -40.4035, function (lat, lon, finalBearing) {

        console.log(lat, lon, finalBearing);

    });

Outputs:

    { distance: '175518.816',

      initialBearing: -40.40353176919702,

      finalBearing: -41.02342255854039 }

    { lat: 30.50034497548687,

      lon: -100.59986425485471,

      finalBearing: -161.1839311037904 }

    175518.816

    175518.816 -40.40353176919702 -41.02342255854039

    30.50034497548687 -100.59986425485471 -161.1839311037904