摘要
Incremental LOD can be transmitted on the network as a stream, then users on the clients can easily catch the skeleton of terrain without downloading all the data from the server. Detailed information in a local part can be added gradually when users zoom it in without redundant data transmission in this procedure. To do this, an incremental LOD method is put forward according to the regular arrangement of grid. This method applies arbitrary sized grid terrains and is not restricted to square ones with a side measuring 2 k + 1 samples. Maximum height errors are recorded when the LOD is preprocessed and it can be visualized with the geometrical Mipmaps to reduce the screen error.
Incremental LOD can be transmitted on the network as a stream, then users onthe clients can easily catch the skeleton of terrain without downloading all the data from theserver. Detailed information in a local part can be added gradually when users zoom it in withoutredundant data transmission in this procedure. To do this, an incremental LOD method is put forwardaccording to the regular arrangement of grid. This method applies arbitrary sized grid terrains andis not restricted to square ones with a side measuring 2~k + 1 samples. Maximum height errors arerecorded when the LOD is preprocessed and it can be visualized with the geometrical Mipmaps toreduce the screen error.
基金
FoundedbyHitechResearchandDevelopmentProgramofChina(863Program)(No.2001AA135180).
关键词
LOD
地理互联网
数据下载
地形仿真
地图制作
incremental
level of detail
grid terrain
terrain visualization
distributed
