Coordinate variables available in separate topography file from data
Added by Karamjeet Khalsa over 12 years ago
Hello,
I am trying to use CDO to remap some data.
Unfortunately, when I call the CDO remap command, CDO returns many warning messages of the form:
"Warning (scarVarAttributes) : NetCDF: Variable not found - ULAT
"Warning (scarVarAttributes) : NetCDF: Variable not found - ULON
"Warning (scarVarAttributes) : NetCDF: Variable not found - TLAT
"Warning (scarVarAttributes) : NetCDF: Variable not found - TLON
This is because the ULAT, ULOT, ETC... Variables are defined within a topography information file that is separate from the data.
The topography file was used to generate the weights for the remapping and there are four separate grids within the weights file. ([ULAT ULON], [ULAT TLON], [TLAT ULON], [TLAT TLON])
If these variables are not available within the data file at the time of conversion, how does CDO know which weight grid to use for the remapping?
Is there a way of providing CDO a pointer to these variables within the topography file?
Thank you, Karamjeet
Replies (1)
RE: Coordinate variables available in separate topography file from data - Added by Uwe Schulzweida over 12 years ago
There is no way to provide a pointer to variables from an other netCDF file.
CDO remap uses only the information provided with the data variables. Use the operator sinfo (section: Horizontal grids) to find out which grid information is used for remapping.