• Progress on R-spatial evolution, Apr 2023 Update
• Progress on R-spatial evolution, Dec 2022 Update
• R-spatial evolution: retirement of rgdal, rgeos and maptools
• Documentation for Terra
• Documentation for SF

R GIS packages "rgdal", "rgeos", and "maptools" are package set to be archived and no longer supported by end of 2023. Many other R GIS packages are build on top of these packages, including "sp" and "raster". The packages recommended as replacement for "sp" is "sf" and the replacement for "raster" is "terra". Below are links to published articles regarding this transition. Additionally, I am including links to the documentation for the new packages recommended to be used "sf" and "terra".