| 基于DEM的延安市沟道提取 |
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| 引用本文： | 鲍其胜,;何立恒,;唐桂兰.基于DEM的延安市沟道提取[J].现代测绘,2014(6):47-49. |
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| 作者姓名： | 鲍其胜 ;何立恒 ;唐桂兰 |
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| 作者单位： | [1]南京市测绘勘察研究院有限公司,江苏南京210019; [2]南京林业大学土木工程学院,江苏南京210037 |
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| 基金项目： | 国土资源公益性行业科研专项项目（201211028-6） |
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| 摘 要： | 利用2013年TM遥感图像对基于DEM提取的沟道网络进行人工识别修正后,获取延安市大于或等于1km的沟道总长为35 919km。沟道提取采用单流向坡面流模拟方法中的D8算法,包括填洼处理、流向分析、汇流分析和提取流域特征4个步骤。
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| 关 键 词： | DEM 沟道提取 单流向法 延安市 |
Gully Extraction in Yan＆#39;an Region Based on DEM |
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| Institution: | BAO Qi-sheng, HE Li-heng, TANG Gui-lan (1 Nanjing Research Institute of Surveying, Mapping ＆ Geotechnical Investigation Co. L td, Nanjing Jiangsu 210019, China; 2 School of Civil Engineering, Nanjing Forestry University, Nanjing Jiangsu 210037, China) |
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| Abstract: | The gully network was distinguished and corrected artificially by using the TM remote sensing image in 2013 .The length of the gully which is greater than or equal to 1 km is 35919 km .The gully extraction used D8 algorithm of single overland flow simulation methods .The method includes 4 steps which are landfill treatment ,flow analysis ,convergence analysis and watershed characteristics extraction . |
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| Keywords: | DEM gully extraction single flow direction algorithm Yan＇an region |
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