Geographic/UTM Coordinate Converter
With this library, you can convert between geographic coordinates and Universal Transverse Mercator (UTM) coordinates, and the other way around.
Usage:
var utmgeoconv = ; console; // { x: 637715, y: 6554533 }console; // { lat: 59.107769, lon: 11.404883 }
The library is using the unmodified source code* found in the Chuck Taylor Toolbox which clearly states :
Programmers: The JavaScript source code in this document may be copied and reused without restriction.
*Except for some formatting and additional JavaScript-code to make it a Node module.