 | |
| Original author(s) | Gerald Evenden |
|---|---|
| Developer(s) | Frank Warmerdam |
| Stable release | 9.5.0[1] 
/ 15 September 2024 |
| Repository | |
| Written in | C++, C |
| Platform | Cross-platform |
| Type | Library |
| License | MIT |
| Website | proj |
PROJ (formerly PROJ.4) is a library for performing conversions between cartographic projections. The library is based on the work of Gerald Evenden at the United States Geological Survey (USGS),[2] but since 2019-11-26 is an Open Source Geospatial Foundation (OSGeo) project maintained by the PROJ Project Steering Committee (PSC). The library also ships with executables for performing these transformations from the command line.
- ^ "Release 9.5.0". 15 September 2024. Retrieved 26 September 2024.
- ^ Evenden, Gerald I. (2003-01-01) [1990]. Cartographic Projection Procedures for the UNIX Environment—A User's Manual (PDF). Open-File Report 90-284. U.S. Geological Survey. p. 64. Retrieved 2015-08-14.