1. National Geospatial-Intelligence Agency (NGA). Department of Defense (DoD) World Geodetic System (WGS) 1984—Its Definition and Relationships with Local Geodetic Systems; 2014. URL 〈http://earth-info.nga.mil/GandG/publications/NGA_STND_12420036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf〉
2. NPSNET;Falby;Comput Graph,1993
3. Lindstrom P, Koller D, Hodges LF, Ribarsky W, Faust N, Turner G. Level-of-detail management for real-time rendering of phototextured terrain. Technical Report. Graphics, Visualization, and Usability Center, Georgia Tech; 1995.
4. Pajarola R. Large scale terrain visualization using the restricted quadtree triangulation. Technical Report 292. Department of Computer Science, ETH Zürich; 1998.
5. Duchaineau M, Wolinsky M, Sigeti DE, Miller MC, Aldrich C, Mineev-Weinstein MB. Roaming terrain: real-time optimally adapting meshes. In: Proceedings of the 8th conference on visualization׳97. VIS׳97. Los Alamitos, CA, USA: IEEE Computer Society Press; 1997. p. 81–8. ISBN 1-58113-011-2.