001391: The <value> parameter is not supported. The projection could not be defined. Output coordinates are in <value>.


ArcGIS uses grid mapping parameters contained in the netCDF file to define the spatial reference of the netCDF layer. The specified grid mapping parameter is not supported. A default coordinate system has been defined.


  • If the netCDF file contains coordinate variables, use them to specify X and Y dimensions (or variables). Data will be in geographic coordinate systems (GCS).
  • Specify a different coordinate system or grid mapping parameter in the netCDF file.

Consult the help for more information on how ArcGIS handles the spatial reference of netCDF data.