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Next, we load a pre-installed map image to get a better geographical reference for the domain we are looking at. Open the Image tab and load 'BigBlueMarble.tiff' by using the Select Installed Image button. Then tick Instance: 1 at the top of the Edit tab, tick Apply to Terrain and set Z to 0. The scene has now changed like this:
| Info |
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The current scene settings can be saved into a VAPOR session file (with a .vss suffix) by using the File → Save Session (As) menu. Then next time we start up VAPOR the saved session files can be loaded to initialise the scene with the saved settings. |
Having set up the view we can now visualise our data. E.g. try the DVR (Direct Volume Rendering) tab, select Variable to relative humidity (r), tick Instance 1 and . Then set Refinement Level to 2 and change the opacity in Transfer Function editor to get this scene:
Giving further instructions and explaining further details about VAPOR visualisation goes beyond the scope of this tutorial. Here we just show a gallery to demonstrate the different ways VAPOR can visualise 3D data. For an in depth introduction please study the VAPOR tutorials at:
https://www.vapor.ucar.edu/docs/vapor-tutorials
Using model level data
This exercise demonstrate how to use model level ECMWF GRIB data with VAPOR. We will work with fields from yesterday's forecast on a low resolution grid over Europe. The steps required are very similar to the previous exercise (with pressure levels) to only exception is the handling of geopotential.
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Right-click on the VAPOR icon and Execute to run