DEM转化为TIN过程中的高程误差分布规律

The Research on Elevation Error Distribution in the Trsformation of DEM and TIN

以陕西省耀县1∶5万比例尺的DEM为基准数据,以ArcView地理信息系统软件为数据处理平台,研究DEM转化为TIN过程中的高程误差特征。试验的核心环节是测定剖面高差阈值对所构建TIN地形描述精度的影响。试验结果表明,随阈值的增加,高程误差分布具有一定的规律性,通过获得其误差分布模型,为利用TIN对该区进行空间分析提供了一定的精度参考。

Based on 1：50000 scale Yao＇ xian DEM, with ARCVIEW as a platform, the author studied the elevation error distribution in the transformation of DEM and TIN. It mainly focused on the affection of threshold value on terrain precision in the transformation of DEM and ITN.The experiment showed that with threshold value increasing elevbation error distributes disciplinarily. Thus, by obtaining the error distribution model, it may provide a precision preference for spatial analysis with TIN.