TerraServer
- http://terraserver.com/
- Online subscription service providing access to a database of high resolution satellite and overhead imagery from all over the world.
Terrain Mapping Software
- http://www.surfacemapper.com/
- Digital mapping software OrthoMapper and SurfaceMapper to create DTM's and digital orthophotos used in the surveying and mapping, photogrammetric, remote sensing and GIS communities