www.vterrain.org

Anchor text: Overview for underwater terrain, data formats, etc.

Wikipedia: Bathymetry

Anchor text: Virtual Terrain Project

Wikipedia: OpenSceneGraph

Anchor text: Defense / Military Virtual Terrain Projects

Wikipedia: SIMDIS

Anchor text: List at Vterrain.org

Wikipedia: Procedural modeling

Anchor text: The State Plane Coordinate System, at vterrain.org

Wikipedia: State Plane Coordinate System

Anchor text: Virtual Terrain Project

Wikipedia: Terrain cartography

Anchor text: Virtual Terrain Project

Wikipedia: Wikipedia:Reference desk/Archives/Miscellaneous/2007 May 15

Wikipedia: Wikipedia:Copyright problems/2007 July 13/Images