An Adaptive Control Method of LODs for 3D Scene Based on R-tree Index

Aiming at the requirement of large-scale 3D city modelling,a method is puts forward to organize LOD scene based on R-tree's hierarchical structure.LOD scene can be automatically generated from leaf node layer to root node,and efficient algorithm of LOD search are also designed and implemented.By experimental analysis,it is proved that scene complexity can be quantitatively altered by adjusting one defined LOD parameter,and further adaptively control LOD of 3D scene,which suits building and tree type especially.