1. If other displays and data are already loaded, select the Edit→Remove All Displays and Data menu item or the icon in the toolbar to clear them out.
2. Load some gridded data.
   • Open the Data Choosers.
   • In the Data Chooser tree click on the Files node.
   • Go to the grid data directory: /data/idv/grids/.
   • Select sample_eta_grid.nc
   • Press Add Source
3. Create a isentropic topography display
   • In the Fields panel open the 3D grid node and Derived node, scroll down the Derived node and select Potential Temperature IsoSurface.
   • In the Displays open Constant Theta Surface Height Plan View node, and select Isentropic Topography and press Create Display
   • A dialog will pop up to allow you to set the isosurface value. The default isosurface value is 310 (default). Click the OK button to create the display.
   • After creating the display you can adjust the data range for the selecting color table.
4. Create a plan view analysis on isentropic surface
   • In the Fields panel open the 3D grid node and Derived node, scroll down the Derived node and select Potential Temperature IsoSurface Scalar Analysis.
   • In the Displays open 3D Theta Surface node, and select Contours Over Constant Theta Surface and press Create Display
   • Set the input of the isosurface value to 310.5.
   • After you click the Ok button, a dialog will pop up to allow you to select the Parameter field. From the dialog, expand the 3D grid node and select the Temperature@Isobaric surface field and click the OK button.
   • After creating the display you can adjust the contour interval and apply the smoothing to the resulting display.
5. Create a vector plan view analysis on isentropic surface
   • In the Fields panel open the 3D grid node and Derived node, scroll down the Derived node and select Potential Temperature IsoSurface Vector Analysis.
   • In the Displays open Constant Theta Surface Flow Displays node, and select Vectors Colored by Speed over Theta Surface and press Create Display
   • Set the input of the isosurface value to 310.5.
   • After you click the Ok button, a dialog will pop up to allow you to select the voctor field. From the dialog, expand the 3D grid node and the Derived node and select the True Wind vectors field and click the OK button.
   • After creating the display you can set the skip value to adjust the density of the resulting display.
6. Sample Image

Unidata IDV Workshop for version 6.2u2 > Accessing and Displaying Data > Working with Gridded Data