有关设计生成数字地面模型的几点建议(英文)

Guidelines for Conception of the DTM Projects

关于影响数字地面模型精度的因素问题 ,不同研究机构的科研人员进行过大量的实验研究 ,并成功获得了影响数字地面模型精度的因素 ,研究成果有着或多或少的相近之处 ,普遍认为原始数据点的三个属性 (精度、密度和分布 ) ,地形特征以及建模方法是影响数字地面模型精度的主要因素。本文分析了一些典型研究的成果 ,并列出一些建设性的提议 ,以提高数字地面模型生成过程中经济上、时间上和质量上的效率。

With regard to the effects that influent the precision of the DTM, a number of experiences has been made in this sense and has given possibilities to assimilate all contours of the crucial problem of the precision of the DTMs perfectly. These experiences have been led by different centers and have succeeded all more or less to the similar results. It's now recognized by unanimity that the accuracy of the primary data, the density of the primary data, the characteristics of the terrain, and the modeling approaches are the principal factors which affect greatly the accuracy of the DTMs. Although these factors act together on the precision of the DTM, it is when we isolate them and we analyze them that the influence of each on the precision of the DTM is exposed clearly. This paper analyses the results of the most typical experiences and outline some useful subjections that can be used to prepare a reasonable project which will assure the efficiency of the generation of DTM, of the point of economic view, time and quality.