I'm trying to display a WFS feature layer and am getting this error when running:
ERROR 4: Unable to open EPSG support file gcs.csv. Try setting the GDAL_DATA environment variable to point to the directory containing EPSG csv files.
I don't understand the suggestion. I tried it and it doesn't work, but it's irrelevant anyway. This is not a build error but runtime, and it must work on android and ios. I have no clue where to go next. I've been on this for a while and have made zero progress.
And I get the error even in sample code such as this Browse WFS layers | ArcGIS for Developers
The wfs from that sample works, I guess it doesn't need this "EPSG support file", but that is of no help to me.
In few cases our WFS support relies GDAL_DATA path to pick up special EPSG parameters and users would need to download it themselves.
Can you please give this a try and see if it works for you?