关键词: Kriging插值, 层次细节模型（LOD）, 反向多级细化, 地形建模

Abstract: Aiming at the limitation that the Level Of Detail（LOD） model can only achieve lower data resolution precision than the original Digital Elevation Model（DEM） data within dynamic terrain modeling process, dynamic terrain Levels Of Backward Detail（LOBD） method based on Kriging algorithm is proposed. This method extracts the area to be reversely refined, determines the multi-level refinement rank, analyzes the region spatial properties interdependency, and fits the variance function according to optimal conditions, interpolates data to the target area according to Kriging interpolation algorithm, and then generates higher precision data than the original DEM data. The interpolation data dynamic store method according to the independent tree structure is also designed. Modeling experiments show that this new dynamic modeling method can increase at least two detail levels than LOD method, and the efficiency of rendering is kept.

Key words: Kriging interpolation, Level Of Detail model（LOD）, multi-level backward refinement, terrain modeling