Terrain describes the shape or surface geometry of the globe. A terrain dataset is sometimes known as a Digital Elevation Model (DEM).
Cesium supports a wide variety of standard terrain formats and servers, not just the few tilesets shown here. See the Terrain Tutorial for information about hooking up Cesium to your terrain data.
STK World Terrain
High-resolution, mesh-based terrain for the entire globe. Free for use on the Internet. Closed-network options are available.
High-resolution, Pennsylvania terrain elevation tileset useful for terrain surface visualization. Free for use on the Internet. Closed-network options are available.
Images on the page above use terrain and imagery data Copyright © Analytical Graphics, Inc., CGIAR-CSI, Microsoft Corporation, Earthstar Geographics SIO, NASA, Harris Corp., Earthstar Geographics LLC, and USGS.