中文摘要：

规则格网DEM（Digital Elevation Model）和不规则三角网TIN（Triangulated Irregular Network）是表面建模的两种方法，它们各自具有不同的特征及其适用范围。以陕西省耀县1：5万比例尺的DEM为基准数据，以ArcGIS地理信息系统软件为数据处理平台，对DEM与TIN在基本地形因子提取、数据量与显示速度、数据精度等方面进行对比分析，提出在实际应用中具体的选择方案。

英文摘要：

TIN and Grid Network are the essential terrain modeling methods with different characteristics and application fields. This paper firstly researched the situation of DEM on the basis of consulting relevant documents,and based on 1：50000 scale Yaoxian DEM, with ArcGIS as a platform, studied the advantage and disadvantage of DEM and TIN in application domain and data precision and proposed the concrete choice plan in practical application.