利用ASTER卫星立体像对提取喀斯特数字地形模型——以广西大化高峰丛深洼地喀斯特地貌为例

ASTER卫星立体像对已经被成功地用于提取全球数字地形模型(DEM),其有效性已经在不同类型的非喀斯特地貌区域得到验证。和一般地貌相比,喀斯特地形,特别是中国南方喀斯特,具有自己独特的形态特征。能否从ASTER影像中精确地提取喀斯特地貌DEM目前尚未见到有任何报道。本文利用ASTER影像成功地提取了广西大化地区高峰丛深洼地的喀斯特地貌DEM,并且将提取结果与同一地区1∶5万地形图控制点的高程和4个剖面的高程变化进行了对比。研究区内绝大部分区域是喀斯特地貌,但在其西北部有一舌状砂岩地貌分布,从而提供了一个很好的喀斯特和非喀斯特地貌DEM精度对比的机会。本文的研究结果表明,从ASTER影像提取出来...

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Bibliographic details
Volume: 30
Main Author: 梁福源 石玉若 George A. Brook
Format: Journal Article
Language: Chinese
Place of publication: 西伊利诺伊大学地理系,Macomb,IL 61455 USA 2011
published in: Zhongguo yan rong Vol. 30; no. 2; pp. 233 - 242
Data of publication: 2011
ISSN: 1001-4810
Alternate Title: Mapping cockpit karst in Southern China from ASTER stereo images:DEM validation and accuracy assessment
Classification Codes:
Discipline: Geography
Bibliography: LIANG FU-Yuan,SHI Yu-ruo ,George A.Brook(1.Department of Geography,Western Illinois University,Macomb,IL 61455 USA;2.Beijing SHRIMP Center,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;3.Department of Geography,University of Georgia,Athens,GA 30602,USA)
45-1157/P
ASTER; DEM; accuracy assessment; topographic shadows; karst; China
Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER) stereo images were used to automatically produce a digital elevation model(DEM) of a rugged karst area in southern China.The accuracy of the DEM was assessed by comparing elevation data at check points and along four transects with reference data derived from 1:50 000 scale topographic maps.The quality of the DEM was significantly improved when the number of ground control points(GCPs) from the topographic maps was increased from 30 to 60 but only slightly improved when 90 points were used.The 90-point DEM had an elevation root mean square error(RMSE) of 42.7 m,which is higher than th
Subjects:
DEM
DEM
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