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：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：CARTOSAT-1, launched in May 2005, is basically a stereo mission; in fact it is equipped with two cameras onboard, namely Aft and Fore, tilted in along track by -5° and +26°, allowing the acquisition of stereo data for every scene with a resolution of 2.5 m. The Institutes of Area di Geodesia e Geomatica - Università di Roma "La Sapienza", Eurimage S.p.A. and CyberCity AG participated at the ISPRS-ISRO Cartosat-1 Scientific Assessment Programme (C-SAP), in order to investigate the DSM generation from Cartosat-1 stereo scenes. This paper describes the work carried out on the stereopair belongin to the test field called TS-8 (Rome, Italy), acquired on 8th June 2005 over the city of Rome, Italy. The stereo images related to the test field were processed with several commercial software (PCI- OrthoEngine, ERDAS, CyberCity-Modeler –CCM-), in order to perform preliminary tests on the sensor potentialities for geomatic applications. The processing included the sensor orientation, DSM generation, orthoimage production and 3D features extraction,. For the orientation of Cartosat-1 imagery, two alternative approaches have been used: a generic rigorous sensor model , implemented in PCI-OrthoEngine, and a rational polynomial coefficients model (RPC), available in PCI-OrthoEngine, ERDAS and CCM. For the evaluation of the DSM accuracy, the DSMs extracted were compared with the heights of several buildings and points on road axis derived from a large scale 3D map (1:2'000); an accuracy (RMSE) between 1 and 1.5 pixel (about 3 m) was achieved both on building heights and on road axis. Secondly, to evaluate the potentials of the images for 3D features extraction, some buildings were modelled semi-automatically in CCM and again compared with the 1:2'000 3D map, achieving an accuracy around 4 m. The third focused item, regarded the evaluation of the orthoimage accuracy, which was estimated by a 2D comparison with the same large scale 3D map; it was showed that it is possible to obtain a horizontal accuracy better then 1 pixel
关键词：Cartosat-1; stereo orientation; DSM extraction; 3D features extraction; model and software comparison; accuracy ; assessment
