PROJ can be crontrolled by setting environment variables. Most users will
have a use for the
On UNIX systems environment variables can be set for a shell-session with:
$ export VAR="some variable"
or it can be set for just one command line call:
$ VAR="some variable" ./cmd
Environment variables on UNIX are usually removed with the
$ unset VAR
On windows systems environment variables can be set in the command line with:
> set VAR="some variable"
`VAR will be available for the entire session, unless it is unset. This is
done by setting the variable with no content:
> set VAR=
The location of PROJ resource files. It is only possible to specify a single library in
PROJ_LIB; e.g. it does not behave like PATH. PROJ is hardcoded to look for resource files in other locations as well, amongst those are the users home directory,
/usr/share/projand the current folder.
Set the debug level of PROJ. The default debug level is zero, which results in no debug output when using PROJ. A number from 1-3, whit 3 being the most verbose setting.