1. Using the latest 80 km CONUS North American Model (NAM) data, create a display of color filled contours of sea level pressure, 500 hPa heights and isosurface of wind speed.
2. Display sea level pressure as contours draped over topography.
3. Create another color filled contour as topography display of sea level pressure and compare with the other one.
4. Use the Edit→Remove All Displays menu to remove the displays.
5. Create display of geopotential height contours at 500 mb on a topography surface of the pressure from the latest GFS 80 km CONUS grid.
   • Create a color filled contour display of geopotential height over topography. When prompted for the topography field, select geopotential height.
   • Now do the same for contours over topography.
   • Turn sharing for both displays.
   • Set the level to 500 hPa.
   • Set the vertical scale to 4800 to 6000 meters to exaggerate the effect.
6. Create another color filled contour as topography display of geopotential height at 500 mb and compare with the other one.
7. Use the Edit→Remove All Displays and Data menu to remove the displays and data.

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