一种基于数字摄影测量系统制作高精度DEM的方法

A Method of Generating High Precision DEM Based on Digital Photogrammetric System

数字高程模型(DEM)是地理信息数据库的基本内核,其应用的广泛性不言而喻。关于DEM的制作方法多种多样。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。这种方法能够达到制作高精度DEM的要求。该文主要论述应用数字摄影测量系统制作高精度DEM及其精度检测的方法。

DEM is the basic kernel of data - base of geographical information, which has wide applications. There are many methods for making DEM. However to produce high accuracy DEM, the technique of digital photogrammetrics and stereoscopic model are needed to editor DEM. This paper primarily discusses the method of generating high accuracy DEM based on digital photogrammetric system and its accuracy check method.