PROJ.4. This web page relates to the PROJ.4 Cartographic Projections library originally written by Gerald Evenden then of the USGS.
Download[edit] ΒΆ The current development source is available by anonymous SVN from The following files are available from the proj ftp directory or http mirror. Proj.Net - Home. Proj4js. 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. GitHub -- Contribute to Proj4js on Github Download -- Get Proj4js now! Proj4Net - Home.