I have proj4 version 4.9.2 installed in a non-standard location within a Linux environment (/p/bin/proj4). I know that proj_def.dat did not go out with version 4.9.1, but was of the understanding that it was included in version 4.9.2. I have verified that it works, I have added /p/bin/proj4/share/proj to my PATH. In addition, I downloaded the datum shifting files for North America to proj/conus. When I run R and load
rgdal, I receive the message that Path to PROJ.4 shared files is autodetected. This is in contrast to gdal, which shows the correct path to my installation of gdal. I provided the following argument when I installed
rgdal "--with-proj-share=/p/bin/proj 4/share/proj".
However, when I run
raster(), I receive the following message:
rgdal::checkCRSArgs:: no proj_defs.dat in PROJ.4 shared files
I have verified that there is a proj_def.dat in proj/ folder.
Is their an argument that I can provide when loading
rgdal that will point to the proj_defs.dat files.