The Tile Set Manager (TSM) Application Programming Interface (API) is an Open Source
library of high level C functions for reading, writing, and processing the terrain data used
by the TerraVision terrain visualization application. The library acts as an abstraction layer
between the application program and the terrain data.
The tsmApi library can read a number of standard mapping
products such as USGS DEM and DOQ, NIMA DTED, GeoTIFF, etc. It also supports the generation of terrain models in GeoVRML format.