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geographiclib

JavaScript implementation of geodesic routines in GeographicLib

Geodesic routines from GeographicLib

This library is a JavaScript implementation of the geodesic routines from GeographicLib. This solves the direct and inverse geodesic problems for an ellipsoid of revolution.

Licensed under the MIT/X11 License; see LICENSE.txt.

$ npm install geographiclib

In node, do

var GeographicLib = require("geographiclib");

Full documentation is provided at http://geographiclib.sourceforge.net/1.46/js/.

var GeographicLib = require("geographiclib"),
    geod = GeographicLib.Geodesic.WGS84, r;
 
// Find the distance from Wellington, NZ (41.32S, 174.81E) to 
// Salamanca, Spain (40.96N, 5.50W)... 
= geod.Inverse(-41.32, 174.81, 40.96, -5.50);
console.log("The distance is " + r.s12.toFixed(3) + " m.");
// This prints "The distance is 19959679.267 m." 
 
// Find the point 20000 km SW of Perth, Australia (32.06S, 115.74E)... 
= geod.Direct(-32.06, 115.74, 225, 20000e3);
console.log("The position is (" +
            r.lat2.toFixed(8) + "" + r.lon2.toFixed(8) + ").");
// This prints "The position is (32.11195529, -63.95925278)."