文章基本信息

标题：An Accuracy Assessment of DSMS and Orthoimages Derived from ALOS/Prism and Their Availability in Forestry
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作者：Y. Imai ; Y. Akamatsu ; M. Mori 等
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：2008
卷号：XXXVII-B8
页码：1021-1026
出版社：Copernicus Publications
摘要：ALOS PRISM is designed to gather 2.5m resolution triplet images to obtain accurate terrain data. The PRISM triplet images are expected to be used for generating high-precision stable Digital Surface Models (DSMs). In this study, we set two purposes. The first purpose is to generate PRISM_DSMs and orthoimages and to make an accuracy assessment of them. The second purpose is the examination of the availability of PRISM_DSMs and orthoimages in forestry. As a result, the following facts were found. The divergence between a PRISM_DSM and a LIDAR_DSM can stay within the standard deviation of 10 m in the vertical direction by adopting the bias correction. The orthoimages made from a PRISM nadir image and a created PRISM_DSM can stay within the standard deviation of 5 m in the horizontal direction. The image matching correlation differs depending on the topographical condition of the object area and the quality of the PRISM_DSM is also dependent on that. Providing one GCP for adjustment can stabilize the accuracy of a PRISM_DSM and an orthoimage. And the created PRISM_DSM well represent contours of buildings and small corrugations of mountainous areas. Concerning the second purpose, the created PRISM_DSM was ranked between the 50m mesh DEM, which was made from a 1/25000 topographic map and published from Japanese Geographical Survey Institute (GSI), and the LIDAR data, proving to be useful for tree height estimation and forest type classification in wide areas
关键词：Satellite; Automation; Image; Matching; DEM/DTM; Orthoimage; Accuracy; Forestry