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PROJ

PROJ (formerly PROJ.4) is a C/C++ library for performing conversions between cartographic projections. The library is based on the work of Gerald (Jerry) Evenden at the United States Geological Survey (USGS), but since 2019-11-26 is an Open Source Geospatial Foundation (OSGeo) project maintained by the PROJ Project Steering Committee (PSC). The library…

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Developer
Frank Warmerdam
License
MIT
Original author
Gerald Evenden
Platform
Cross-platform
Repository
github.com/OSGeo/PROJ
Stable release
9.8.1 / 10 April 2026; 4 months ago (10 April 2026)

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Overview

History

Ports

Advanced semantic analysis

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Map overview Semantic statistics

PROJ

Nodes20
Edges19
Triples51
Avg. degree1.9
Density0.1
Components1

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PROJ

Top relations

related to history · 19
PROJ → After, As, Evenden, Fortran, Frank Warmerdam, GCTP, GDAL, General Cartographic Transformation Package, Gerald Evenden, It, March, May, MetaCRS, OSGeo, Ratfor, September, The, UNIX, WGS84-based
related to Ports · 18
PROJ → Bindings, Excel, Fortran, Golang, Java, JavaScript, Julia, MetaCRS, MySQL, Perl, Proj4J, Proj4JS, Python, Ruby, Rust, TCL, The, Visual Basic
see also · 5
PROJ → Apache SIS, Free, GDAL, Java, OGC WKT
Developer · 1
PROJ → Frank Warmerdam
License · 1
PROJ → MIT
Original author · 1
PROJ → Gerald Evenden
Platform · 1
PROJ → Cross-platform
Repository · 1
PROJ → github.com/OSGeo/PROJ
Stable release · 1
PROJ → 9.8.1 / 10 April 2026; 4 months ago (10 April 2026)
Type · 1
PROJ → Library

Important terminology Word statistics

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Important terminology

library release evenden osgeo coordinate cartographic project transformations gerald transformation support based performing gdal ports also developed used systems version

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
PROJDeveloperFrank Warmerdam1.00infobox
PROJLicenseMIT1.00infobox
PROJOriginal authorGerald Evenden1.00infobox
PROJPlatformCross-platform1.00infobox
PROJRepositorygithub.com/OSGeo/PROJ1.00infobox
PROJStable release9.8.1 / 10 April 2026; 4 months ago (10 April 2026)1.00infobox
PROJTypeLibrary1.00infobox
PROJWebsiteproj.org1.00infobox
PROJWritten inC++, C1.00infobox
PROJrelated to historyThe0.60section
PROJrelated to historyGerald Evenden0.60section
PROJrelated to historyRatfor0.60section

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    Min side: 3
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