DEM精度评估方法的研究与实践

Research and practice of accuracy evaluation method in DEM

研究地形模型精度的关键就是要找到影响地形模型建模质量的相关因素及其他们之间的误差关系,以检测现有的DEM模型的精度,同时规范DEM模型建立的精度标准,使DEM模型能够更加准确、逼真地反映实际地面特征是DEM精度评估和质量控制的难点问题。本文从几个方面对DEM的精度评估方法进行了研究与实践,为今后DEM的精度评估提供了科学的参考依据和评估模型。

It is very important to find out the factors and their error relationship for terrain model accuracy study,so as to detect the accuracy of present DEM model.These factors can influence modeling quality of terrain model.At the same time,it is the most difficult problem for DEM accuracy evaluation and quality control to standardize accuracy criterions of DEM model establishment,then to make DEM model to reflect actual terrain characters more exactly and realistically.In this paper,the methods of DEM accuracy evaluation are studied and practiced from several aspects,which will provide scientific reference for the future work.