Terrain LOD: [lod_terrain.jpg] This talk presents background material covering the various level of detail (LOD) techniques that have been developed to represent large terrain meshes. A number of core concepts are explained, such as the use of regular grids versus triangulated irregular networks (TINs), quadtrees versus bintrees, as well as out-of-core paging of data and streaming of data over wide-area networks. A selection of some of the key terrain LOD algorithms is presented, including Duchaineau's ROAM and Hoppe's View Dependent Progressive Mesh methods. This talk was part of Course #14, Advanced Issues in Level of Detail, at SIGGRAPH 2002.