datum parameter proj4 - SERP Analysis

http://proj.maptools.org/gen_parms.html

https://proj.org/en/stable/development/reference/cpp/datum.html

https://proj.org/en/stable/usage/projections.html

https://gis.stackexchange.com/questions/385114/how-to-update-crs-r-object-from-proj4-to-proj6

https://pygis.io/docs/d_understand_crs_codes.html

https://cran.r-project.org/web/packages/proj4/proj4.pdf

http://proj.maptools.org/faq.html

https://www.binaryearth.net/CoordinateMaster/Windows/CustomCoordinateSystems.html

https://geotrellis.readthedocs.io/en/latest/architecture/proj4-implementation.html

https://www.npmjs.com/package/proj4