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：2009
卷号：XXXVIII-3/W8
页码：236-241
出版社：Copernicus Publications
摘要：Due to world wide .ood events hydrodynamic-numerical (HN) water .ow simulation became a topic of highest interest. Next to the consideration of physical properties, a high quality geometric model of the run-off surface is essential for these simulations. In the last years airborne laser scanning (ALS) became the prime data acquisition technique for the modelling of inundation areas. When fully exploiting this technique detailed and accurate surface models that fulfil the HN simulation requirements can be determined. For that aim an adequate georeferencing of the ALS data and advanced modelling strategies are necessary. This paper presents a fully automated procedure for the extraction of break lines from ALS data. These lines should support the generation of accurate digital terrain models. Furthermore, the paper demonstrates the importance of relative georefencing of ALS data in order to allow an accurate break line modelling. Both issues are practically demonstrated by a project along the river Main. Next to documenting the geometric quality of the originally delivered ALS data, the paper presents the results after improving the georeferencing by means of strip adjustment, which for this project had to be realised without trajectory information. Furthermore, the results of the automatic break line determination process are presented. Finally, the paper provides a discussion of the results and an outlook into future work for automated break line determination
关键词：Airborne Laser Scanning; LIDAR; break lines; georeferencing; digital terrain model
