ERROR 4: Unable to open EPSG support file gcs.csv.

[RTC]

Our app is getting this error since updating to 100.15.4 SDK for iOS.  How can we resolve this issues?

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.

[Ting]

Please visit https://developers.arcgis.com/ios/downloads/#projection-engine-data to download the projection engine data, and see gdaldata folder inside. It should contain the gcs.csv file.

This change happened a few releases back, though I cannot pin down the exact time (some time around 2021).

Read more about spatial reference and projection in this doc.

There is a related sample "List transformations" that you may take a look at.

Let me know if you have other questions.

[RTC]

Thank you for the info!