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 B3
页码：860-864
出版社：Copernicus Publications
摘要：Presently for the orthophoto projects and small-scale mapping (e.g., 1:2,500) the aerial triangulation is no longer essential while Direct Georeferencing System (DGS) is available as a complementary technique. Though, it is possible to achieve sufficient accuracy by doing simultaneous block adjustment with minimum number of the ground control points, in some cases there are insufficient inaccuracies of a direct georeferencing in large scale mapping of 1/1000. 1/500. It is very cost effective by reducing the expenses for the ground surveying. Further, quality control and accuracy improvement of the photo block are promising with the DGS. In this paper, the investigation of the experimental accuracy of simultaneous bundle adjustment for large-scale mapping is reported. Since 2002, the PASCO Corporation has introduced two sets of APPLANIX POS/AV for its two units of aerial cameras (RC30) and we have conducted several accuracy investigations. According to the specification of product, the accuracy levels of direct georeferencing system after post-processing are 5 - 30 cm for the position; 0.005 deg for roll and pitch; and 0.008 deg for heading angle in case of high-end system. As the Geoid model is also required to transform it from ellipsoidal height to orthometric height (above mean sea level), and to always guarantee the accuracy level of large scale mapping, it was considered that the simultaneous block adjustment is essential for 1:1000 – 1:500 scale mapping. Since bundle adjustment improves block geometry, it seems that the middle class DGS is accurate enough. In this paper we present the results of the accuracy evaluation using APPLANIX POS AV/DG 310. The number and configuration of ground control points were also considered
