by SYCODE Terrain for AutoCAD is a terrain modeling plug-in for AutoCAD. This plug-in gives AutoCAD the ability to create a terrain mesh from a set of unordered points, lines, polylines and splines.
by SYCODE TerrainCAD is a terrain generation, editing and modeling software. Powered by TerrainLib, TerrainCAD employs blazing fast and robust algorithms to create and modify terrain meshes in no time.