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 B4
页码：945-950
出版社：Copernicus Publications
摘要：When areas interested by catastrophic events like landslides are investigated, it is important to have a great amount of information with a greater than possible detail. It allows to evaluate the damages that occurred on the territory, to get a precise picture of post event situation and to understand the reasons and the effects of the event. This work starts from the availability of a great amount of different information (satellite images, airborne LIDAR data, DTM from maps, DTM from laser, ground surveys) over an area of Southern Italy that was involved in a significant landslide event in 1998. Particularly, laser data have been used in order to improve the geometric and interpretative features of a satellite high resolution QuickBird image. In fact, laser data provide a double 'product': an elevation information, and, therefore, a Digital Terrain Model, and, at the same time, an intensity response. The DTM can be used to orthorectify the satellite images, the intensity response to create an intensity raster image as to increase the capability of analysis and interpretation of the images. In the present work the laser DTM accuracy has been evaluated in order to study the influence of different problems occurred during the laser survey, particularly problems with GPS signal acquisition. Furthermore, the work evaluates the accuracy of an orthoimage generated with a DTM obtained from the integration of height LIDAR data and a map derived DTM and analyses the use of intensity data to integrate the satellite image
关键词：LIDAR; radiometry; high resolution imagery; data integration; DTM; landslides
