JavaScript implementation of geodesic routines in GeographicLib
npm install geographiclib-geodesicThis package is a JavaScript implementation of the geodesic routines
from GeographicLib. This solves the
direct and inverse geodesic problems for an ellipsoid of revolution.
Prior to version 2.0.0, this was a component of the node package
geographiclib. As of
version 2.0.0, that package was split into the packages
geographiclib-geodesic
(this package) and
geographiclib-dms.
geographiclib will be
deprecated on 2023-05-01.
Licensed under the MIT/X11 License; see
LICENSE.txt.
``bash`
$ npm install geographiclib-geodesic
In node, do
`javascript`
var geodesic = require("geographiclib-geodesic");
Full documentation is provided at
https://geographiclib.sourceforge.io/JavaScript/doc.
`javascript
var geodesic = require("geographiclib-geodesic"),
geod = geodesic.Geodesic.WGS84, r;
// Find the distance from Wellington, NZ (41.32S, 174.81E) to
// Salamanca, Spain (40.96N, 5.50W)...
r = 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)...
r = 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)."
``
* algorithms + js code: Charles Karney (karney@alum.mit.edu)
* node.js port: Yurij Mikhalevich (yurij@mikhalevi.ch)