ASTER立体像对提取玛尔挡坝区DEM及精度评价  

Extraction and accuracy assessment of DEM on maerdang dam area from ASTER stereo image data

作　　者：王广杰[1] 何政伟[1] 仇文侠[1] 许辉熙[1,2] 

机构地区：[1]成都理工大学.数字国土与生态科学研究所,成都610059 [2]四川建筑职业技术学院,四川德阳618000

出　　处：《测绘科学》2009年第3期94-96,共3页Science of Surveying and Mapping

基　　金：四川省杰出青年学科带头人培养计划(06ZQ026-014):水电工程对干热河谷生态地质环境的影响及评价模型研究;青海黄河玛尔挡水电站水库区工程地质遥感解译(中国水电顾问集团西北院工程勘察研究院委托)

摘　　要：ASTER立体像对提取DEM已经成为近年来DEM提取研究的热点问题。本文基于ENVI软件,利用AS-TER立体像对提取青藏高原玛尔挡坝区DEM,并对其进行精度评价和误差来源分析。结果表明,利用ENVI软件提取ASTER-DEM方法可行,提取的DEM效果较好,能与地形图重叠,高程精度可达30m,而且地形较平坦地区精度高于地形陡峭地区;控制点的多少及精度、成像时的环境和气象条件、波段特性、影像空间分辨率等都影响着DEM的精度。Extraction of DEM from ASTER stereo image data based on ENVI software is hot problem in recent years on DEM extracting research. This article extracts Maerdang dam area DEM from ASTER Stereo image data, assesses its accuracy, and analyses its errors source. Results indicate that, extraction of ASTER-DEM based on ENVI software is feasible; the DEM can overlay with topo- graphic map; the elevation accuracy, which in flat area is higher than in stee Parea, can reach to 30m on the whole. What affect accuracy of ASTER-DEM are numbers and accuracy of GCPS（ ground control points） , environment and weather condition on image production, wave band properties, image spatial resolution, etc.

关 键 词：ASTER立体像对 玛尔挡坝区 DEM提取 精度评价 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]