| 基于DEM汇流模拟的鞍部点提取改进方法 |
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| 引用本文： | 张维,汤国安,陶旸,罗明良. 基于DEM汇流模拟的鞍部点提取改进方法[J]. 测绘科学, 2011, 36(1): 158-159,163 |
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| 作者姓名： | 张维 汤国安 陶旸 罗明良 |
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| 作者单位： | 南京师范大学虚拟地理环境教育部重点实验室;西华师范大学国土资源学院; |
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| 基金项目： | 国家自然科学基金资助项目(40930531,40901185); 江苏省普通高校研究生科研创新计划项目资助(CX09B_299Z) |
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| 摘 要： | 鞍部点是重要的地形控制点之一,由于其特殊的形态特征,基于DEM的鞍部点提取算法较山顶点、山谷点提取更为困难.本文提出一种基于DEM汇流模拟的鞍部点快速提取改进算法.该算法利用DEM地表汇流模拟的方法提取山脊线,利用地形倒置得到的反地形地表汇流模拟提取反地形流域边界线,获得能自动实现地形部分的原始地形汇水线,进而通过特征...
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| 关 键 词： | DEM 鞍部点 汇流模拟 反地形 |
An improved method to saddles extraction based on runoff concentration simulation in DEM |
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| ZHANG Wei,TANG Guo-an,TAO Yang,LUO Ming-liang. An improved method to saddles extraction based on runoff concentration simulation in DEM[J]. Science of Surveying and Mapping, 2011, 36(1): 158-159,163 |
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| Authors: | ZHANG Wei TANG Guo-an TAO Yang LUO Ming-liang |
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| Affiliation: | ②(①Key laboratory of Virtual Geographic Environment,Ministry of Education,Nanjing Normal University,Nanjing 210046,China;②Land and Resource College,China West Normal University,Sichuan Nanchong 637002,China) |
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| Abstract: | The saddle is one of the most important terrain feature points,the extraction of saddles based on DEMs is of significance to digital terrain analysis.Nevertheless,owning to saddles' unique morphological characteristic,it has more difficulties in extracting saddles than any other terrain feature points.This paper presented an improved saddles extraction method based on runoff concentration simulation in DEM.Firstly,the ridge lines were extracted by runoff concentration simulation in DEM.Then,inversed DEM wer... |
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| Keywords: | DEM saddles runoff concentration simulation inversed terrain |
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