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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
> Hi, > > It's not clear how I should change the sigma coordinate to be more well > defined for my dataset to work in IDV. Can more guidance or information be > provided? > > Thanks, > Rebecca > 303-312-6867 > Rebecca, Could you remind me which sample file you uploaded a while ago? Yuan > > -----Original Message----- > From: Unidata IDV Support [mailto:address@hidden] > Sent: Tuesday, April 08, 2014 11:13 AM > To: Matichuk, Rebecca > Cc: address@hidden > Subject: [IDV #WPM-804362]: IDV - Vertical Scale Question > > > Hi Yuan, > > > > A sample model output file (netcdf) has been uploaded to your server. > > Please let me know if additional information is needed. > > > > Thank you, > > Rebecca > > 303-312-6867 > > > > > > Rebecca, > Sorry for the delay reply. > I checked the uploaded sample file, the problem of this dataset is that the > sigma coordinate is now well defined. Here is the link of the CF sigma > convention: > > https://earthdata.nasa.gov/sites/default/files/field/document/cf-conventions_v1.4.pdf > > and check the section 4.3 for more detail information. > > Yuan > > -----Original Message----- > > From: Unidata IDV Support [mailto:address@hidden] > > Sent: Tuesday, April 01, 2014 2:11 PM > > To: Matichuk, Rebecca > > Cc: address@hidden > > Subject: [IDV #WPM-804362]: IDV - Vertical Scale Question > > > > > Hi, > > > > > > I'm trying to use IDV to visualize some 3D model output over the U.S. > > > However, I'm having problems using my data in IDV to generate isosurface > > > and cross-section displays. In particular, it doesn't appears that the > > > vertical scale/dimension is getting read in properly. I'm getting the > > > error message included below. For the isosurface display, IDV is only > > > plotting one level/layer or the data is not appearing in 3D, only as a > > > single layer. The vertical scale of my data is in sigma coordinates. If > > > necessary, I'd be happy to send you some of my data. > > > > > > Error Message" "Unknown vertical coordinate with Unit null" > > > > > > Please let me know how my data/model output should be structured in the > > > netcdf file to ensure that the vertical scale/dimension is setup properly > > > for IDV. Also, is there a way to plot sigma coordinates or point IDV to > > > use a certain vertical scale from another file? > > > > > > Thank you, > > > Rebecca > > > 303-312-6867 > > > > > > > > Hi Rebecca, > > Sorry for the delay reply. > > > > Please upload a sample to our RAMADDA server: > > > > motherlode.ucar.edu/repository/alias/idvupload > > > > > > Yuan > > > > Ticket Details > > =================== > > Ticket ID: WPM-804362 > > Department: Support IDV > > Priority: Normal > > Status: Open > > > > > > > Ticket Details > =================== > Ticket ID: WPM-804362 > Department: Support IDV > Priority: High > Status: Closed > > Ticket Details =================== Ticket ID: WPM-804362 Department: Support IDV Priority: High Status: Open