Proj4js is a javascript library to transform point coordinates from one coordinate system to another, including datum transformations.

this library is a port of both the proj.4 and gctcp c libraries to javascript. enabling these transformations in the browser allows geographic data stored in different projections to be combined in browser-based web mapping applications.

proj4js is a part of the metacrs group of projects and uses the same mit style license as proj.4.

this package contains the proj4.js javascript library.