文章基本信息

标题：Assessment of Dem Accuracy Derived From Spot-5 High Resolution Stereoscopic Imagery
本地全文：下载
作者：W. Kornus ; R. Alamús ; A. Ruiz 等
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：2004
卷号：XXXV Part B1
页码：445-453
出版社：Copernicus Publications
摘要：This paper describes the derivation of Digital Surface Models (DSMs) from 3-fold along-track stereoscopic SPOT-5 imagery in the scope of the HRS (High Resolution Stereoscopic) study, organized by the Centre Nacional d'études Spatiales (CNES) and the International Society of Photogrammetry and Remote Sensing (ISPRS). The orientation of SPOT-5 is reconstructed by bundle adjustment using a functional model based on correction polynomials. It resulted in an RMS-error of 2 m in Easting, Northing and Height at 17 check points. DSMs are produced for 4 test sites, which are located in different terrain types (mountainous, moderate and urban). An automatic region growing image matching process generates a dense point cloud in image space, which later is rigorously transformed into the object space and converted into a regular spaced DSM. The comparison with a digital terrain model (DTM) of superior accuracy yields standard deviations better than 5 m (1σ) in flat and moderate terrain and better than 10 m (1σ) in mountainous regions. An additional DSM covering the entire image scene (approx. 60 km x 80 km) is produced with a standard deviation of approximately 8 m using the commercial software ISAE and rational functions. The sigma values include all errors of the automatic matching process as well as the differences between the surface and the terrain model and therefore must be regarded as conservative. All results are finally summarized and conclusions are drawn from the study
关键词：SPOT; Space Photogrammetry; Orientation; Adjustment; DSM/DTM; Comparison; Accuracy