First, a DEM is created according to the digital contour lines from the basic geographic data.

首先，根据基础地理数据，按其等高线层生成DEM；

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This Paper discusses the theories and methods on making high quality DEM bases on terrain feature from digital contour line.

本文系统地阐述了基于等高线数据建立高质量DEM的理论和方法。

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In this paper the author discusses the theories and methods on making high quality DEM and TIN based on terrain feature from digital contour line.

本文全面系统地论述了基于等高线、地性特征建立TIN和DEM的理论和方法。

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