First, integrating Anshan present situation the author analyze EDM date and obtain surface model according to DEM basic concept and feature, and put forward accurate mathematical model of EDM, and do analysis and comparison to existing DEM.

• 论文首先从DEM的基本概念和特征的探讨出发，结合鞍山市具体情况分析数字高程模型的数据获取：数字高程模型表面建模方法，进而提出数字高程模型精度的数学模型，并对目前存在的数字高程建模化方法进行分析和比较。