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4.9.3 WorldWind Locations
NASA'S WorldWind program comes with a tiled location database that allows for progressive disclosure of locations as you zoom in. The IDV makes use of this database.
  1. Start fresh by clearing all displays and data Show popup and go to a CONUS projection (Projections->Set->US->CONUS menu item).
  2. Create the WorldWind display control from the Displays->Special->WorldWind Locations menu item.
  3. This is just like the Location display control except it progressively discloses more detailed locations as you zoom.
  4. Zoom into Colorado and watch how the display changes.
  5. Zoom into Boulder. Remember, if things go blank you just zoomed past the surface of the Earth. Use the Projections->Set->Use Displayed Area menu item to reset the projection.
  6. Add a Background Image and change the layer to Urban Area.
  7. Keep zooming.
  8. Remove the Background Image display control.
  9. Change projections to some other part of the world and see what is listed.

 


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U09-NRM-127: The role of Distributed Data Access Technologies in NRM - for ITC-IDV version 2.7 > Accessing and Displaying Data > GIS and Miscellaneous Displays