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：2010
卷号：XXXVIII Part 4
出版社：Copernicus Publications
摘要：The aim of this study is to analyze the accuracy of Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER) Global Digital Elevation Model (GDEM) over Istanbul metropolitan city. Accuracy assessment was conducted bycomparing ASTER GDEM with a reference DEM derived from 1/5.000-scaled topographic maps. The selected area has widerange of elevations since it covers coastal and mountainous areas. Different land cover types like urban, sea, lakes, agriculturalland, forest, grasslands, bare lands are available within the study area. The accuracy assessment of GDEM was performed byvisual interpretation and statistical analysis. Throughout the statistical analysis, several transects representing different types ofland cover and topography were selected and minimum, maximum and mean errors and Root Mean Square Error values of eachtransect were calculated, respectively. The quality of ASTER GDEM was analyzed for Istanbul region and it was found thatASTER GDEM could represent the main topographic features of Istanbul precisely yet there are some erroneous representationsover some parts of the study area. In most part of the study region, ASTER GDEM has 20 m or better accuracy however in someportions error values are higher than 20 m.
