https://www.r-project.org/nosvn/R.check/r-devel-linux-x86_64-debian-gcc/proj4-00check.html
Check results for 'proj4'
check resultsproj4
https://openlayers.org/en/latest/apidoc/module-ol_proj_proj4.html
OpenLayers v10.9.0 API - Module: ol/proj/proj4
9 0api moduleopenlayersv10ol
https://metacpan.org/pod/PDL::Transform::Proj4
PDL::Transform::Proj4 - PDL::Transform interface to the Proj4 projection library - metacpan.org
PDL::Transform interface to the Proj4 projection library
interface topdltransformproj4projection