[gdal-dev] When does the env var GDAL_DATA get processed?

[Tamas Szekeres]

2009/5/7 brettwiesner <brettwiesner at gmail.com>

> Yes that's the error message. It goes on the say somthing about trying to
> find gcs.csv which is there but since it can't find the env var, it doesn't
> find the data. This is weird because I set the env var using the win32
> function SetEnvironmentVariable() before the call to OGRSpatialReference is
> made. Since I was setting the variable and getting this message I suspected
> that GDAL_DATA was being read by something at startup.
>

Hi,

I'm afraid you won't be able to set the environment variable this way. GDAL
is using getenv() to retrieve the value which operated on a local copy of
the variables created when the process is started. By this means the env
variable should be set before the process is spawned.



>
> Is there some code I can write that can tell me what gdal thinks the
> GDAL_DATA env var is set to?
>

You should instead use SetConfigOption or PushFinderLocation (both exposed
to the SWIG API) for this purpose.


Best regards,

Tamas
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