Thursday, September 30, 2004
NASA World Wind
Nasa World Wind is an amazing program that allows any user to zoom from high altitude to any place on the Earth's surface. The data comes from high-resolution LandSat and USGS data.
Some of images are literally jaw-dropping; in particular the USGS high-resolution ortho-imagery. (To view this, use the Layer Manager, select "High-Resolution Terrain Mapped Imagery" and deselect all but "USGS Urban Area Ortho-Imagery".) Several major US cities are covered at 0.25m. Good examples are Washington D.C., Houston, Chicago and Tampa Bay. For a list of ortho-imagery data see here.
The final cool part to World Wind is that it is implemented in C# and includes full source code.