The Model of Terrain Features Preserved in Grid DEM

A new DEM which is called features preserved Grid Digital Elevation(F-DEM) is proposed in this paper.The F-DEM is based on the "Vectorizing simulation and rasterizing organization" method and combines characteristics both of the terrain the physical objects by applying the object-oriented technology.Through abstractly describing terrain characteristics based on their morphology and seamlessly embedding terrain features information into general grid data with segmentation technology,F-DEMs not only can maintain the structural integrity of grid DEM,overcome the disadvantage of imprecision terrain description in some places containing break terrain features,but also can keep its efficiency of terrain simulation with preserved features,which is of critical significance to research high-fidelity DEMs.