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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Jason, In the field selector, go to "Formulas" Data Sources. Select Grids > "Define a grid diagnostic". Select a Display of Color-Shaded Plan View or the display of your choice. Click Create Display. This action will bring forth an input window. Enter the formula "maskGrid(grid, mask)" Click OK Now select the relevant fields in the pop-up "Field Selector" dialog. Click OK. These actions should result in the desired image. Let us know if you have trouble. Best, Unidata IDV Support > Full Name: Jason Warren > Email Address: address@hidden > Organization: self > Package Version: 5.0u3 build date:2015-01-26 08:05 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_5.0u3\jre version: 1.7.0_51 > j3d:1.6.0-pre9-daily-experimental daily > Description of problem: > > Hi, > > I am trying to use categorical rain/snow data to create precip type maps > in the IDV. I assume the maskGrid formula mentioned on your site would > help me, however, it is not contained in the actual IDV formula library. > Where can I find this or how can I add this to the IDV? > > IDV Version 5.0u3 > > Ticket Details =================== Ticket ID: CRK-901738 Department: Support IDV Priority: Normal Status: Closed