I have setup a consol app in C# that uses the GDAL.CORE NuGet, it seems to work fine when converting most of the .shp files I have, however with one .shp file I am getting the error below:

System.ApplicationException: 'EPSG PCS/GCS code 4326 not found in EPSG support files. 
Is this a valid EPSG coordinate system?'

I am using the gcs.csv file below which seems to include this coordinate code = 4326

enter image description here

Also I have setup the path to my gdal-data correctly, so I know its reading my gcs.csv file.

Gdal.SetConfigOption("GDAL_DATA", "C:\\Program Files\\GDAL\\gdal-data");

Do you have any suggestions?

  • What does ogrinfo print about the coordinate reference system of that shapefile? – user30184 Jan 21 at 11:57
  • How can I get ogrinfo in C# code ? this is what I am currently doing string shapefilePath = dataDir + "\\Manchester.shp"; string jsonPath = dataDir + "/output_out_GDALCORE.json"; Gdal.SetConfigOption("GDAL_DATA", "C:\\Program Files\\GDAL\\gdal-data"); OSGeo.OGR.Ogr.RegisterAll(); OSGeo.OGR.Driver shpDriver = Ogr.GetDriverByName("ESRI Shapefile"); DataSource shpDatasource = shpDriver.Open(shapefilePath, 0); – Roberto Luongo Jan 21 at 12:18
  • Use binaries, I just want to see information about the source data and if is looks exceptional. – user30184 Jan 21 at 12:37
  • thanks for prompt reply !!, I just had a look and there is nothing unusual, can't really attach it to this post though, any other suggestions ? – Roberto Luongo Jan 21 at 14:36
  • Make a copy with ogr2ogr ogr2ogr -f "ESRI Shapefile" -a_srs epsg:4326 output.shp input.shp. Does your code show the same exception with the copy? – user30184 Jan 21 at 15:59

Issue is sorted after creating a copy of the original shape file and running the conversion against the copied shape file.

C# consol app >> DataSource shpDatasourceCreateCopy = shpDriver.CopyDataSource(shpDatasource, dataDir + "\\CopyTest", new string[0]);

  • Now it might be possible for you to find the real reason for the issue. Something is different in the original than in the copy. – user30184 Jan 22 at 14:36

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