cff-version: 1.2.0
message: Please cite this software using these metadata or in the CITATION file.
type: software
title: PROJ
version: 9.8.1
date-released: 2026-04-10
doi: 10.5281/zenodo.5884394
abstract: PROJ is a generic coordinate transformation software that transforms
  geospatial coordinates from one coordinate reference system (CRS) to another.
  This includes cartographic projections as well as geodetic transformations.
url: https://proj.org
repository-code: https://github.com/OSGeo/PROJ/
license: MIT
authors:
  - given-names: Gerald I.
    family-names: Evenden
    affiliation: United States Geological Survey
  - given-names: Even
    family-names: Rouault
    affiliation: Spatialys
    orcid: https://orcid.org/0000-0002-5068-0476
  - given-names: Frank
    family-names: Warmerdam
    affiliation: Planet Labs Inc
  - given-names: Kristian
    family-names: Evers
    affiliation: Danish Agency for Climate Data
    orcid: https://orcid.org/0000-0002-1310-4576
  - given-names: Thomas
    family-names: Knudsen
    affiliation: Danish Agency for Climate Data
  - given-names: Howard
    family-names: Butler
    affiliation: Hobu Inc
    orcid: https://orcid.org/0000-0002-5340-1380
  - given-names: Mike W.
    family-names: Taves
    affiliation: GNS Science
    orcid: https://orcid.org/0000-0003-3657-7963
  - given-names: Kurt
    family-names: Schwehr
    affiliation: Google Inc
    orcid: https://orcid.org/0000-0002-5624-8190
  - given-names: Elliott
    family-names: Sales de Andrade
    orcid: https://orcid.org/0000-0001-7310-8942
  - given-names: Charles
    family-names: Karney
    affiliation: SRI International
    orcid: https://orcid.org/0000-0002-5006-5836
  - given-names: Sebastiaan
    family-names: Couwenberg
  - given-names: Nyall
    family-names: Dawson
    affiliation: North Road
    orcid: https://orcid.org/0000-0001-9812-7584
  - given-names: Alan D.
    family-names: Snow
    affiliation: Corteva
    orcid: https://orcid.org/0000-0002-7333-3100
  - given-names: Javier
    family-names: Jimenez Shaw
    orcid: https://orcid.org/0000-0002-7227-9173
keywords:
  - PROJ
  - geodesy
  - cartography
  - coordinates
  - projections
  - conversion
