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：2005
卷号：XXXVI-3/W19
页码：97-102
出版社：Copernicus Publications
摘要：Detailed high-resolution digital terrain models (DTM) can be obtained using airborne laser scanner data. This paper evaluates the accuracy of DTM derived from first return of laser scanner data for forest studies. Study area is located in a boreal forest zone. The data were acquired with TopoSys-1 under leaf-on condition. The study shows that the use of first pulse data for DTM generation in boreal forest zone results in comparable random errors as last pulse derived DTM. Even under leaf-on conditions, the random errors were typically less than 20 cm. The major difference in the performance is the small systematic elevation shift of the order of 10-20 cm in the first pulse DTM compared to the use of the last pulse. The effects of tree species, terrain slope, the vegetation covers and interpolation on first pulse-derived DTM were also investigated
关键词：DTM; quality; first pulse; last pulse; laser scanning; TIN; grid
