数字高程模型的生产及更新

Production and Renewal of Digital Elevation Model(DEM)

数字高程模型 (DEM)是基础测绘的重要产品之一 ,结合测绘生产实际情况 ,阐述了数字高程模型生产的主要技术环节 。

DEM is one of important productions of basic surveying and mapping. The paper introduced main technical link of DEM producing course combining with surveying and mapping actual producing circumstance, and brought up methods to renew data by DEM already contained.