Comparison of Extracting Slope Algorithms in Different Types of Landscape

HE Zhen-fang; ZHAO Mu-dan; HAN Yu

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Comparison of Extracting Slope Algorithms in Different Types of Landscape

- Comparison of Extracting Slope Algorithms in Different Types of Landscape
- Bulletin of Soiland Water Conservation Vol. 27, Issue 6, Pages: 126-129(2008)
- 作者机构：
  
  西北大学城市与资源学系,陕西,西安,710069
- 作者简介：
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- Published：2008
- 稿件说明：
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HE Zhen-fang, ZHAO Mu-dan, HAN Yu. Comparison of Extracting Slope Algorithms in Different Types of Landscape[J]. Bulletin of Soiland Water Conservation, 2008, 27(6): 126-129.
DOI：

HE Zhen-fang, ZHAO Mu-dan, HAN Yu. Comparison of Extracting Slope Algorithms in Different Types of Landscape[J]. Bulletin of Soiland Water Conservation, 2008, 27(6): 126-129. DOI：

摘要

分别选取陕北延川、贵州省黔西南牛场、河北省井径县作为黄土地貌、喀斯特地貌以及低山丘陵地貌的典型样区

并建立该样区的1∶1万

5 m分辨率的DEM。采用简单差分、二阶差分、Frame差分、三阶不带权差分、三阶反距离平方权差分(Horn算法)、三阶反距离权差分6种算法提取坡度

对不同算法提取坡度的信息进行对比研究

并分析了不同算法提取坡度产生差异的原因

确定了适合不同地貌的算法。结果表明

在不同的地貌类型上使用8个邻接单元的算法精度总高于使用2个或4个邻接单元的算法

其中三阶反距离平方权差分(Horn算法)与三阶反距离权差分在所研究的3种地貌类型上均是比较合适的。

Abstract

Yanchuan County of North Shaanxi Province

Niuchang of Southwest Guizhou Province

and Jingjing County of Hebei Province are selected as the typical areas of the loess landscape

karst landform

and hilly landform

respectively.DEM is taken as the research object in the three landform areas with spatial resolution of 5 m according to the map scale of 1∶10 000.Six slope algorithms to extract slope are used and comparison analysis is made to identify suitable algorithms for different landforms.Results show that the reasonable algorithms are three-order inverse distance square weight difference and three-order inverse distance weight difference.The accuracy of the algorithm using eight adjacent units is higher than the algorithm using two or four adjacent units.

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