| 点坡度熵在地形简化中的应用 |
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| 引用本文： | 李明峰,李连阳,赵湘玉,陆海芳.点坡度熵在地形简化中的应用[J].测绘通报,2019,0(11):109-113. |
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| 作者姓名： | 李明峰 李连阳 赵湘玉 陆海芳 |
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| 作者单位： | 南京工业大学测绘科学与技术学院,江苏 南京,211816;南京工业大学测绘科学与技术学院,江苏 南京,211816;南京工业大学测绘科学与技术学院,江苏 南京,211816;南京工业大学测绘科学与技术学院,江苏 南京,211816 |
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| 基金项目： | 江苏省重点研发计划（BE2015698）；江苏省研究生科研与实践创新计划（KYCX18_1055）；南京市科技计划（201716027） |
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| 摘 要： | 坡度是定量描述地貌形态特征的重要因子。针对DEM坡度在地形简化中应用研究较少的现状，本文基于信息熵理论提出了点坡度熵（SEP）概念，构建了量化地形信息的点坡度熵模型，研究了基于点坡度熵的地形简化方法。结合试验样区数据，将常用的重要点法与该方法进行了应用对比。结果表明，该方法可有效保留地形骨架信息，取主舍次效果优于重要点法。该方法对后续DEM地形简化研究具有一定参考价值。
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| 关 键 词： | 点坡度熵 DEM 地形简化 地形信息 模型 |
| 收稿时间： | 2019-01-02 |
Application of slope entropy of points in terrain simplification |
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| LI Mingfeng,LI Lianyang,ZHAO Xiangyu,LU Haifang.Application of slope entropy of points in terrain simplification[J].Bulletin of Surveying and Mapping,2019,0(11):109-113. |
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| Authors: | LI Mingfeng LI Lianyang ZHAO Xiangyu LU Haifang |
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| Institution: | School of Geomatics Science and Technology, Nanjing Tech University, Nanjing 211816, China |
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| Abstract: | Slope is an important factor to describe the landforms quantitatively. In view of the problem of few research on the slope in DEM terrain simplification, the concept and model of slope entropy of points, which can describe the terrain information, are proposed based on the information entropy. And what's more, a new method of terrain simplification is studied. Relied on the data in experimental areas, we compare the new method named SEP with the common method named VIP. It turns out that SEP can retain the terrain skeleton information effectively. In addition, SEP has a better result than VIP in retaining the primary terrain skeleton and abandoning the less important terrain skeleton. The new method has certain reference value for the following study on terrain simplification. |
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| Keywords: | SEP DEM terrain simplification terrain information model |
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