但要生产高精度DEM，一般是采用数字摄影测量方法，借助于立体模型对DEM进行可视化编辑、修改。
However to produce high accuracy DEM, the technique of digital photogrammetrics and stereoscopic model are needed to editor DEM.
三维地形建模及可视化是GIS、计算机图形学、虚拟现实、数字摄影测量等领域的研究热点。
3d terrain modeling and visualization are hot research topics in GIS, computer graphics, virtual reality, digital photogrammetry and other associated fields.
三维地形建模及可视化是GIS、计算机图形学、虚拟现实、数字摄影测量等领域的研究热点。
3d terrain modeling and visualization are hot research topics in GIS, computer graphics, virtual reality, digital photogrammetry and other associated fields.
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