文章基本信息

标题：DEM extraction from archive aerial photos: accuracy assessment in areas of complex topography
本地全文：下载
作者：Giuseppe Pulighe ; Francesco Fava
期刊名称：European Journal of Remote Sensing
电子版ISSN：2279-7254
出版年度：2013
卷号：46
期号：1
页码：363-378
DOI：10.5721/EuJRS20134621
摘要：The aim of this study is to analyze the accuracy of a Digital Elevation Model (DEM) created with photogrammetric techniques from stereoscopic pairs of aerial photos in areas with complex geomorphologic characteristics. The evaluation of DEM and derived geomorphometric parameters was conducted by comparison with other standard DEM products (i.e. TINITALY/01 and ASTER GDEM-V2) and by accuracy assessment based on Check Points (CPs). The validation process includes the comparison of elevation profiles, the calculation of DEM accuracies, and the evaluation of the effect of slope and aspect on the DEM accuracy. The produced DEM accurately represent complex terrain (RMSE = 4.90 m), thus providing information suitable for local-scale geomorphometric analysis. The obtained accuracy resulted slightly worse than TINITALY/01 (RMSE = 2.53 m), but significantly better than ASTER GDEM (RMSE = 12.95 m). These results confirm that photo-based DEM extraction can be a very competitive and precise methodology if other expensive high-resolution data are not accessible.
关键词：DEM ; aerial photos ; aerial triangulation ; accuracy assessment