This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Add the following attribute to the Lambert_Conformal variable: Lambert_Conformal:units = "m"; So the system knows the units of the false easting/northing. It should figure it out from the x,y coordinates, but it doesnt right now. Its also a hole in the CF standard that should be added. Juerg Schmidli wrote:
Hi John Please find attached an example netcdf file. I think there are two issues: (1) Horizontal Position: Does IDV understand the grid_mapping variable, or do I need to include 2-dimensional lat on lon variables as described in the CF-conventions document?
With above, should work.
(2) Vertical Coordinate: The physical height above MSL is given by the 3-dimensional ZP variable. Is there a way to make IDV understand this?
because you have a valid zc coordinate variable, it uses that. How would you imagine the IDS using the ZP coordinate?
Thanks for your help, Juerg