PROJ.4 is in active use by GRASS GIS, MapServer, PostGIS, Thuban, OGDI and OGRCoordinateTransformation as well as various other projects (please let me know about other projects using PROJ.4!).
is a translator library for raster geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation. As a library, it presents a single abstract data model to the calling application for all supported formats. It also comes with a variety of useful commandline utilities for data translation and processing.
The Electronic Document Library contains documents on intelligent transportation systems topics published or sponsored by the U.S. Dept. of Transportation
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