Digital geological mapping obtains regional geological survey data in the field and re-shows its production in digital regularity.

数字地质填图是指区域地质调查数据的野外获取及其成果的数字化统一性再现。

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GPS, navigation function, and digital geological mapping system comprehensive utilization enrich the teaching practice field, improve teaching methods, models, and made a good teaching.

GPS定位、导航功能和数字填图系统的综合利用，丰富了野外实践教学内容，对改进教学方法、模式，取得了良好的教学效果。

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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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