Provides bindings to the 'Geospatial' Data Abstraction Library ('GDAL') (>= 1.11.4) and access to projection/transformation operations from the 'PROJ.4' library. The 'GDAL' and 'PROJ.4' libraries are external to the package, and, when installing the package from source, must be correctly installed first. From 'rgdal' 1.4-1, provision is made for 'PROJ6' accommodation, with 'PROJ6' functionality to follow; from 1.4-1 'rgdal' will build and function when 'PROJ' >= 6. From 'rgdal' 1.5-1, attempts are made to adapt the handling of coordinate reference systems to 'GDAL' 3 and 'PROJ' 6, using 'WKT2_2018' strings. Both 'GDAL' raster and 'OGR' vector map data can be imported into R, and 'GDAL' raster data and 'OGR' vector data exported. Use is made of classes defined in the 'sp' package. Windows and Mac Intel OS X binaries (including 'GDAL', 'PROJ.4' and 'Expat') are provided on 'CRAN'.