Title :
Effective techniques for interactive rendering of global terrain surfaces
Author :
Zhang, Liqiang ; Yang, Chongjun ; Liu, Suhong ; Ren, Yingchao ; Liu, Donglin ; Rui, Xiaoping
Author_Institution :
State Key Lab. of Remote Sensing Sci., Beijing Normal Univ./Chinese Acad. of Sci., China
fDate :
4/1/2005 12:00:00 AM
Abstract :
Global terrain visual systems must support real-time visualization and manipulation of huge multiresolution geographical datasets. In this letter, we focus on certain key techniques, such as construction of three-dimensional (3-D) ellipsoidal models, spatial indexing mechanisms, interactive terrain datasets simplification by the M-band wavelets and triangulation techniques, and surface browsing from different view directions. Finally, an experiment is carried out using different levels of detail data; our results suggest that the methods are effective in enhancing performance of a 3-D global visual system.
Keywords :
geophysical signal processing; interactive systems; real-time systems; rendering (computer graphics); terrain mapping; topography (Earth); 3D ellipsoidal models; 3D global visual system; M-band wavelets; ellipsoidal quadtrees; global terrain surfaces; interactive rendering; interactive terrain datasets; multiresolution geographical dataset; real-time visualization; spatial indexing; surface browsing; triangulation techniques; Computer graphics; Data structures; Earth; Indexing; Laboratories; Layout; Remote sensing; Spatial resolution; Visual system; Visualization; Ellipsoidal quadtrees; M-band wavelets; multiresolution; spatial indexing;
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2005.846013
