Generic Coordinate Transformation Library ('PROJ') C API

Provides a 'PROJ' <> C API that can be used to write high-performance C and C++ coordinate transformation operations using R as an interface. This package contains an internal version of the 'PROJ' library to guarantee the best possible consistency on multiple platforms, and to provide a means by which 'PROJ' can be used on platforms where it may be impractical or impossible to install a binary version of the library.


Reference manual

It appears you don't have a PDF plugin for this browser. You can click here to download the reference manual.


8.1.0-1 by Dewey Dunnington, 12 days ago,

Report a bug at

Browse source code at

Authors: Dewey Dunnington [aut, cre] , PROJ authors [aut] , Jeroen Ooms [cph] (configure script) , Evan Roualt [cph] , Thomas Knudsen [cph] , SDFE [cph] , Kristan Evers [cph] , Frank Warmerdam [cph] , Charles Karney [cph] , Evan Roualt [cph]

Documentation:   PDF Manual  

MIT + file LICENSE license

Imports rappdirs

Suggests gh, testthat

Linking to cpp11

System requirements: C++11, libcurl, libtiff, zlib

See at CRAN