| DEM地形描述误差空间结构分析 |
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| 引用本文： | 汤国安,曹菡.DEM地形描述误差空间结构分析[J].西北大学学报,2000,30(4):349-352. |
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| 作者姓名： | 汤国安 曹菡 |
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| 作者单位： | 西北大学城市与资源学系,陕西西安 |
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| 基金项目： | 国家自然科学基金资助项目(49971065)；国家教
育部资助优秀年轻教师基金；测绘遥感信息工程国家重点实验开放资助基金项目(WKL(99)03
02) |
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| 摘 要： | 首先提出ＤＥＭ（ＤｉｇｉｔａｌＥｌｅｖａｉｏｎ Ｍｏｄｅｌ）地形描述误差的提取方法，通过误差地图以及量化研究方法，揭示ＤＥＭ误差的空间分布规律，试验结果显示：误差地图是实现ＤＥＭ误差可视化的有效方法；ＤＥＭ地形描述误差具有很强的空间自相关性，自相关值随地形复杂度与ＤＥＭ分辨率的改变而有规律的变化。
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| 关 键 词： | 数字高程模型 误差 空间结构 |
| 修稿时间： | 2000-01-18 |
An investigation of the spatial structure of DEM errors |
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| TANG Guo an ,ZHAO Mu dan ,CAO Han.An investigation of the spatial structure of DEM errors[J].Journal of Northwest University(Natural Science Edition),2000,30(4):349-352. |
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| Authors: | TANG Guo an ZHAO Mu dan CAO Han |
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| Institution: | TANG Guo an 1,ZHAO Mu dan 1,CAO Han 2 |
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| Abstract: | Digital Terrain Models are one of the key data set in the database of geographical information system.However,the existence of DEM errors influence the accuracy of spatial analysis results.The method of deriving DEM terrain representation errors is put forward first,then,the spatial distribution of DEM error with both visualization and quantification approaches are investigated.The results of this experiment account for that error maps can visually and effectively show the spatial distribution of the errors.DEM terrain representation errors are strongly autocorrelated and varies along with the variation of terrain types and DEM resolutions,which provides a significant basis for the mathematical simulation of DEM errors. |
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| Keywords: | Digital Elevation Model error spatial structure visualization |
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