Terrain Server
A Terrain Data Source is a collection of raw, unprocessed terrain data files. Examples of terrain data sources include:
STK Terrain Server combines one or more data sources together in a user-defined order and processes them to create a tileset that is ready for fast, accurate 3D visualization.
A single data source often consists of a large number of files, each representing rasterized terrain heights in an area. For high-resolution terrain covering a large area, the total size of the files in a data source can be huge, sometimes measured in the terabytes.
The individual files may have different spatial resolutions and may even partially overlap each other. Within a data source, however, it is assumed that the order of individual files is not important. To control the layer ordering of individual files, put the files in separate data sources and specify their order when creating a tileset.
STK Terrain Server supports georeferenced raster data source files in any format readable by GDAL and in most map projections.