期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII-B8
页码：343-350
出版社：Copernicus Publications
摘要：In this work several techniques for the elaboration of landslides databases are compared. The used techniques are the digitising on ortophotographies, the digitising on aerial photographs and geometrical correction, and, finally, the stereoplotting using digital photogrammetry. The landslide scarps databases derived from the different methodologies have been compared by several indexes such as the displacement between crown lines of scarps, the lengths of scarps, and the adjustment of scarps to a DTM. The analysis shows lower or higher discrepancies between the databases, with displacements between 8 and 45 meters, depending on the compared methodologies and landslides typologies. The best results are obtained with the methodology of digital stereoplotting whose scarps database is well adjusted to the DTM. Among the rest of methodologies, the digitising on orthophotography presents the lower differences with the previous one, while the methodology of the digitising on photogram presents the worst results, with a certain spatial pattern related with the relief displacement. The conclusion is to recommend the use of the digital stereoplotting to elaborate landslides databases and as possible alternatives the digitising on ortophotography (especially if they are derived from the stereoscopic pairs used in the interpretation), being dissuaded the digitising on the photogram, at least in zones with a strong relief
关键词：Spatial Quality; Landslides Database; Digital Photogrammetry
