proj: proj (Cartographic Projections Library) proj: proj: PROJ.4 is a library for performing conversions between cartographic proj: projections. The library is based on the work of Gerald Evenden at proj: the USGS, but is now an OSGeo project maintained by Frank Warmerdam. proj: The library also ships with executables for performing these proj: transformations from the command line. proj: proj: proj: proj: Packaged by Georgi D. Sotirov