[1]胡卓玮,李洋,王志恒,等.基于DEM的四川省低山丘陵区坡度提取不确定性分析[J].山地学报,2012,(05):636.
　HU Zhuowei,LI Yang,WANG Zhiheng.Uncertainty Analysis Extracting from the Slope of Hilly Area of Sichuan Province Based on DEM[J].Mountain Research,2012,(05):636.
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基于DEM的四川省低山丘陵区坡度提取不确定性分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2012年05期
页码:
636
栏目:
山地学报
出版日期:
2012-01-01

文章信息/Info

Title:
Uncertainty Analysis Extracting from the Slope of Hilly Area of Sichuan Province Based on DEM
作者:
胡卓玮;李洋;王志恒;
1.首都师范大学 资源环境与旅游学院，北京100048；
2.资源环境与地理信息系统北京市重点实验室，北京100048；
3.灾害评估与风险防范民政部重点实验室，北京100048
Author(s):
HU Zhuowei;  LI Yang;  WANG Zhiheng
1. College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China;
2.Key Lab of Resources Environment and GIS, Beijing 100048 China;
3. Key Laboratory of Integrated Disaster Assessment and Risk Governance of the Ministry of Civil Affairs, Beijing 100048, China
关键词:
DEM; 坡度; 不确定性; 四川省低山丘陵区
Keywords:
DEM;  slope;  uncertainty;  hilly area of Sichuan province
分类号:
P931.91
文献标志码:
A
摘要:
针对四川省低山丘陵区,以GIS为技术支撑,深入分析研究区坡度提取的不确定性。以平均坡度代表区域坡度的一般水平,采用6种地貌类型的12组不同分辨率的DEM数据,研究平均坡度与DEM空间分辨率、区域地貌特征的关系,定量分析基于DEM提取坡度的不确定性。结果表明,研究区不同地貌单元内,平均坡度随着DEM分辨率的减小而减小,呈现出很强的线性变化规律,其衰减速率基本不变;其回归方程的常数项与所在地貌单元的沟壑密度呈显著的二次曲线变化特征;坡度提取的精度与DEM的空间分辨率成正相关关系。
Abstract:
In allusion to the hilly area of Sichuan Province, the paper analyzes the uncertainty of slope extraction deeply based on the GIS technology, taking the average as the general level of the regional slope, using the different resolution DEM data of six physiognomy types in 12 groups, which aims to study on the relationship of average slope and DEM spatial resolution, the regional topographic features, and to the quantitatively analyze the uncertainty extracting from the slope based on DEM. It first shows in different landform units of the study area, the average slope reduces with the decrease of the DEM resolution, which shows an obvious linear variation and the attenuation rate is almost stable. In addition, between the constant term of its regression equation and the ravine density of landform unit to which it belongs, there is a significant characteristic of quadratic section change. It also presents a direct correlation between the accuracy of slope extraction and DEM spatial resolution

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备注/Memo

备注/Memo:
收稿日期(Received date)：2012-02-16；改回日期(Accepted) : 2012-05-29。
作者简介（Biography）：胡卓玮 (1979-)，男，汉族，江西景德镇人，博士，副教授。\[Hu Zhuowei (1979-) ,male, the Han nationality，born in Jing Dezhen of Jiangxi, doctor, adjunct professor.\] E-mail：huzhuowei@gmail.com *
通讯作者(Corresponding author)：硕士生，E-mail：liyang0320@foxmail.com
更新日期/Last Update: 1900-01-01