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：148-152
出版社：Copernicus Publications
摘要：High resolution space images are becoming more and more important as their resolution and availability improve. Images having a ground pixel size of 0.6 m or 1.0 m are competing with classical aerial photos. The space images cover large areas, reducing the number of control points needed. If rational polynomial coefficients (RPC) are available, the number of control points can be reduced even further. Using RPCs, mapping is also possible without control points if only relative accuracy is required, and if an absolute accuracy in the range of a standard deviation of ±12 m is acceptable. Stereo models and individual images taken by IKONOS, QuickBird and SPOT 5 have been analyzed, as well as IRS-1C level 1B and Landsat images. The achieved accuracy is sufficient for mapping and orthoimage generation. Digital surface models (DSM) are generated by image matching, showing the height of the visible surface. DSMs can be reduced to digital elevation models (DEM), which can be used for producing orthoimages. It is not necessary to use the same sensor for achieving the DEM, so it is possible to compute an IKONOS orthoimage based on a SPOT 5 DEM
