期刊名称：Archiwum Fotogrametrii, Kartografii i Teledetekcji
印刷版ISSN：2083-2214
出版年度：2008
卷号：18
语种：English
出版社：Main Board of Association of Polish Surveyors
摘要：The analysis was aimed at testing of aerial lidar data for Digital Terrain Model (DTM) and Digital Surface Model (DSM) generation. Lidar data wereobtained from The JRC,an EU research institute. The test area was located near Ispra,Italy. There were 5 test areas: 3 of them covered a flat JRC region and 2 covered the urban,modulated surface of Ispra near the lake. The TerraScan and Geomedia software packages were applied for data processing. Lidar data processing algorithms and DTM inner and external accuracy were tested. In the ground point classification using the Terrasolid,the triangle length and interaction angle were tested. The optimal triangle length in the TerraScan was found to amount to 45 m. The first phase involved generation of a DTM;subsequently,a DSM was developed basedon lidar cloud point classification (low,middle and high vegetation,and buildings). The accuracy analysis was performed using a DTM with 0.1 m and 1 m pixel size. The resolution of 0.1 m was chosen to render the DTM as comparable as possible to the density of lidar points. However,resolution of 1 m was also tested because of its usual application in DTM generation from lidar data. Two kinds of accuracy were tested. We called them the inner (comparison of DTM and lidar data) and the external (comparison of DTM and GPS RTK) accuracy. The inner DTM accuracy was estimated at 10-30 cm. The DTM and GPS comparison allowed to determine the systematic error of 20-30 cm and standard deviation of 50 cm. The accuracy (inner and external) obtained was lower than expected. The future research should explain these phenomena. The work was supported by the AGH project No. 11.11.150.949.
其他摘要：Przedmiotem prezentowanych analiz byáo testowanie metodyki przetwarzania lotniczych danych lidarowych dla potrzeb tworzenia numerycznego modelu terenu (NMT) i numerycznego modelu powierzchni terenu (NMPT). Testowanie przeprowadzono w oparciu o dane lidaro
