With the continuous absorbing the recent achievement of surveying and mapping, the digital map warehouse will become an infrastructure of basic land map management system of GuangZhou .
随着地籍测绘成果的不断纳入，电子地籍图库作为广州市国土房管局基础图库系统的基础，将实现广州市国土房管局基础图库系统数据的不断更。
This paper describes the basic concepts of digital terrain model (DTM), how to use DTM in practice in the mining geological exploration, and how to use CASS surveying and mapping system to build DTM.
简要阐述了数字地面模型(dtm)的基本概念，并结合矿山地质勘查，提出实际情况应用，利用CASS成图系统建立模型。
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