Hi everyone, I'm trying to define a coordinate system in a netCDF data file which includes a stretched vertical grid **with terrain**. This means that the vertical coordinate is not uniform over the entire domain *or* in a 2-D x-y plane. In other words, a point at 3,5,18 will have a physical height of 4.0, but a point at 6,12,18 will have a physical height of 12.0. If I can use the physical height to define the 3-D coordinate system, that would be great, but I have yet to find a way to define this coordinate system in netCDF. Does anyone have experience in defining a stretched vertical grid w/terrain in a netCDF file? If you do, please let me know! Thanks very much for your help!! Jason Levit -------------------------------------------------------------------------------- Jason John Levit, N9MLA Undergraduate Research, University of Oklahoma Center for Analysis and Prediction of Storms School of Meteorology jlevit@tornado.gcn.uoknor.edu PH:405/325-5366 www: http://tornado.gcn.uoknor.edu/