| 数字河网提取的影响参数优化分析 |
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| 引用本文： | 陈俊明,林广发,杨志海,陈瀚阅.数字河网提取的影响参数优化分析[J].地球信息科学,2011,13(1):32-37. |
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| 作者姓名： | 陈俊明 林广发 杨志海 陈瀚阅 |
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| 作者单位： | 福建师范大学地理科学学院;福建省陆地灾害工程技术研究中心; |
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| 基金项目： | 国家自然科学基金项目(40401049); 福建省科技厅创新平台建设项目(2009Y2002) |
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| 摘 要： | 数字高程模型(Digital Elevation Model,DEM)是提取数字河网的主要数据源.但是,由于在受到带有尺度效应的DEM空间分辨率和数字河网提取过程中,汇流面积阈值等参数的影响,使得河网提取的结果具有很大的主观性,因此,如何优化两者的取值,对于更准确地模拟地表河网具有重要的意义.本文以厦门市作为研究区,以...
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| 关 键 词： | 尺度效应 DEM分辨率 汇流面积阈值 河网提取 |
| 收稿时间： | 2010-03-22; |
Parameters Optimization in Extracting Digital Drainage Networks with DEM |
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| CHEN Junming,LIN Guangfa,YANG Zhihai,CHEN Hanyue.Parameters Optimization in Extracting Digital Drainage Networks with DEM[J].Geo-information Science,2011,13(1):32-37. |
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| Authors: | CHEN Junming LIN Guangfa YANG Zhihai CHEN Hanyue |
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| Institution: | CHEN Junming,LIN Guangfa,YANG Zhihai,CHEN Hanyue(1.College of Geography,Fujian Normal University,Fuzhou 350007,China,2.Fujian Provincial Engineering Research Center for Monitoring and Assessing Terrestrial Disasters,China) |
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| Abstract: | Digital Elevation Model(DEM) is the main data source for digital drainage network extraction.But the extracted result would have great subjectivity because of the scale influences by the parameters such as the drainage area threshold and DEM resolution.Therefore,it is of great significance that how to optimize these factors for extracting the drainage networks better.The existing researches are mainly concerned on any two factors qualitatively or quantitatively.It is yet to be answered about how to define t... |
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| Keywords: | scale effect DEM resolution drainage area threshold drainage network extraction |
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