| 数字高程模型精度评价及其问题探讨 |
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| 引用本文： | 刘永琼,吴艳兰,胡海,胡鹏.数字高程模型精度评价及其问题探讨[J].测绘信息与工程,2009,34(5):25-27. |
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| 作者姓名： | 刘永琼 吴艳兰 胡海 胡鹏 |
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| 作者单位： | 武汉大学资源与环境科学学院; |
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| 基金项目： | 国家自然科学基金资助项目(40701155) |
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| 摘 要： | 分析了数字高程模型（DEM）精度评价中检查点“中误差”法的局限及DEM产品的实际质量问题,提出了采用等高线回放法以逼近误差的概念,以衡量DEM全域出现的最大误差。
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| 关 键 词： | 数字高程模型 误差评价 精度指标 内插模型误差 质量 |
ASSESSMENT METHOD OF DIGITAL ELEVATION MODELS ACCURACY AND ITS LIMITATIONS |
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| LIU Yongqiong WU Yanlan HU Hai HU Peng.ASSESSMENT METHOD OF DIGITAL ELEVATION MODELS ACCURACY AND ITS LIMITATIONS[J].Journal of Geomatics,2009,34(5):25-27. |
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| Authors: | LIU Yongqiong WU Yanlan HU Hai HU Peng |
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| Institution: | LIU Yongqiong WU Yanlan HU Hai HU Peng(School of Resource , Environment Science,Wuhan University,129 Luoyu Road,Wuhan 430079,China) |
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| Abstract: | We analyzes the limitations of the accuracy assessment by the root mean square error(RMSE),which is routinely used for accuracy assessment of a DEM.Then we give two examples showing how the DEM quality problems arise from the use of RMSE assessment.Finally,we emphasize that correct understanding of the nature of the interpolation model error is fundamental to define the criteria for the scientific assessment of a DEM,thus plotting the contour overlay should be a effective method for DEM accuracy assessment. |
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| Keywords: | DEM error assessment accuracy criteria interpolation model error quality |
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