Updated projection related documentation.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
7 jobs for enhancement/add_anyproj_compatibility in 4 minutes and 13 seconds (queued for 1 second)
Name Stage Failure
failed
test_urls Test
 --------------------------------------------------
No urls found.


Done. The following urls did not pass:
https://zenodo.org/badge/latestdoi/253474603
make: *** [Makefile:64: urlcheck] Error 1
Cleaning up file based variables
ERROR: Job failed: exit code 1