| 利用IKONOS立体像对提取DEM精度的实验 |
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| 引用本文： | 丁辉,姚安强.利用IKONOS立体像对提取DEM精度的实验[J].测绘科学,2012(1):179-181. |
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| 作者姓名： | 丁辉 姚安强 |
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| 作者单位： | 中国地质调查局西安地质调查中心;长安大学地质工程与测绘工程学院 |
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| 基金项目： | 黄土高原区地质灾害遥感数据处理项目(1212010814037);陕西省特大滑坡调查与风险评价(1212010814027);延安宝塔区地质灾害监测预警示范(1212010740907) |
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| 摘 要： | 由于IKONOS不提供基于共线模型所需的卫星星历参数,而提供基于有理函数(RPC)的近似模型,因此点位精度和高程精度主要由RPC模型精度来决定。直接使用RPC模型对标准几何校正产品进行DEM提取,这种精度不能满足高精度制图的要求。本文讨论了基于IKONOS立体像对提取翠华山地区的DEM及其精度情况。为提高精度,采用高精度GPS仪(Mobile Mapper CX高程精度达亚米级)野外采集控制点,对RPC模型进行修正。对比分析结果表明DEM精度明显提高,仅需少量的控制点,DEM和正射影像均满足15∶000比例尺地形图和遥感平面制图要求。
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| 关 键 词： | IKONOS RPC 翠华山地区 数字高程模型 |
DEM generation and analysis using IKONOS stereo pairs |
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| DING Hui①②,YAO An-qiang.DEM generation and analysis using IKONOS stereo pairs[J].Science of Surveying and Mapping,2012(1):179-181. |
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| Authors: | DING Hui①② YAO An-qiang |
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| Institution: | ①(①Xi’an Center of Geological Survey,China Geology Survey,Xi’an 710054,China;②Geological Engineering and Mapping Engineering College,Chang’an University,Xi’an 710054,China) |
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| Abstract: | IKONOS uses the Rational Polynomial Camera(RPC)model,also called an Image Geometry Model(IGM),as a substitute of rigid geometrical model based on the collinearity equation.The horizontal and vertical accuracies of generated DEM are mainly dependant on the accuracy of RPC model.By only using RPC model,the positional accuracy and vertical accuracy of reference product can’t meet the requirements of high accuracy topographic map.In order to improve the accuracy,the ground control points collected during hazard survey were used to revise the previous RPC model in the paper.It revealled that the accuracy of extracted DEM was improred apparently,which could meet the requirements of 1∶5000 remote sensing cartographic map and topographic map. |
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| Keywords: | IKONOS Rational Polynomial Coefficients Cuihua mountain Digital Elevation Model |
| 本文献已被 CNKI 等数据库收录！ |
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