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：2000
卷号：XXXIII Part B4 (/1-3)
页码：61-68
出版社：Copernicus Publications
摘要：The first mission using space-borne single-pass-interferometry was launched in February this year – the Shuttle RadarTopography Mission (SRTM). The goal of this mission has been to survey the Earth’s surface and generating ahomogeneous and dense elevation data set of the entire world. Antennas with two different wavelength were used. Oneof the hardware components was the German / Italian Synthetic Aperture Radar X-band antenna (X-SAR).In this paper we report on an attempt to check the quality and accuracy of the elevation data derived from the X-bandinstrument of SRTM. First of all possible error sources influencing the data quality and accuracy will be described andthe effects of these errors will be demonstrated.Reference data of a well known test site will be used to assess the data and to derive quality measures. The area with asize of 50x50 km² is situated in Germany a few kilometers south of Hanover. Reference data are being made availableby the Surveying Authority of Lower Saxony, Germany (Landesvermessung und Geobasisinformation Niedersachsen,LGN Hannover). The Digital Terrain Model of LGN (ATKIS DGM5) is said to have an accuracy of about ±0,5 meters.Also Trigonometric Points, which are the base of the fundamental geodetic network of Germany, are being used asreference data.The tool used for assessing the data is a spatial transformation. As a result 7 parameters are being obtained, whichdescribe the position, orientation and a scale of the SRTM elevation data with respect to the reference data. To obtaininfluences of terrain slope, the orientation of the terrain with respect to the sensor position, vegetation, land use and landcover the test side is divided into several subareas. The accuracy and quality of the data as a function of theseparameters will be calculated
关键词：Accuracy; Land use; Land cover; Validation; Digital Terrain Model; Digital Surface Model
