geographiclib-geodesic (original) (raw)

2.1.1 • Public • Published 9 months ago

JavaScript implementation of the geodesic routines in GeographicLib

This 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 packagesgeographiclib-geodesic(this package) andgeographiclib-dms.geographiclib will be deprecated on 2023-05-01.

Licensed under the MIT/X11 License; seeLICENSE.txt.

Installation

$ npm install geographiclib-geodesic

Usage

In node, do

var geodesic = require("geographiclib-geodesic");

Documentation

Full documentation is provided athttps://geographiclib.sourceforge.io/JavaScript/doc.

Examples

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)."

Authors