| DEM精度检查中等高线回放的量化方法 |
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| 引用本文： | 范青松,汤翠莲,胡鹏.DEM精度检查中等高线回放的量化方法[J].测绘科学,2008,33(3):118-120. |
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| 作者姓名： | 范青松 汤翠莲 胡鹏 |
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| 作者单位： | 武汉大学资源与环境科学学院,武汉,430079;长江勘测规划设计研究院,武汉,430010 |
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| 摘 要： | 目前数字高程模型(DEM)精度检查中广泛采用等高线回放方法,以目视检查方式进行,定性为主。基于集合论引进了一种量化方法,即层次等高线差异栅格分析法,用于描述等高线回放的平面位置变形量。实验证明此方法不仅可视化效果好,其量化指标有助于定位DEM误差,包括粗差;也适合对不同DEM内插方法精度评定的对比分析。
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| 关 键 词： | DEMs精度 精度评价 等高线回放 |
A quantitive approach for accuracy assessment of DEMs by comparing derived contour maps with original ones |
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| FAN Qing-song,TANG Cui-lian,HU Peng.A quantitive approach for accuracy assessment of DEMs by comparing derived contour maps with original ones[J].Science of Surveying and Mapping,2008,33(3):118-120. |
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| Authors: | FAN Qing-song TANG Cui-lian HU Peng |
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| Abstract: | The accuracy of DEMs is often evaluated by manually comparing derived contour maps with original ones.A quantitative methodology based on set theory has been developed for objective assessment of errors of contour maps generated from DEMs.Difference cells between areas bounded by contours of two maps at each elevation are used to evaluate accuracy of generated DEMs.It is shown that this approach is practical to reveal the errors of DEMs. |
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| Keywords: | accuracy of DEMs accuracy assessment derived contour maps |
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