| 基于DEM的西北干旱区典型地貌类型坡度提取分析 |
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| 引用本文： | 李娟,赵军.基于DEM的西北干旱区典型地貌类型坡度提取分析[J].遥感技术与应用,2008,23(2):214-218. |
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| 作者姓名： | 李娟 赵军 |
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| 作者单位： | （西北师范大学地理与环境科学学院, 甘肃 兰州730000） |
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| 摘 要： | 由于DEM数据本身的多尺度因素,加之地形、地貌特征具有宏观性与区域分异性的特点,直接的信息提取往往很难达到预期的目的,同时,利用DEM进行坡度提取,精度具有很大的不确定性。选取西北干旱区典型地貌类型的平原和丘陵地作为试验区,利用1∶1万和1∶5万DEM,对不同比例尺及不同空间分辨率DEM的坡度提取结果进行对比,分析变化规律,并对坡度提取误差进行量化模拟,成果对西北干旱区进行生态环境建设具有一定的参考价值。
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| 关 键 词： | DEM 西北干旱区 坡度提取 分析 |
| 文章编号： | 1004-0323(2008)02-0214-05 |
| 修稿时间： | 2007年10月22 |
Slope-Extraction Analysis of Typical Physiognomy in Northwest Droughty Area Based on DEM |
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| LI Juan,ZHAO Jun.Slope-Extraction Analysis of Typical Physiognomy in Northwest Droughty Area Based on DEM[J].Remote Sensing Technology and Application,2008,23(2):214-218. |
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| Authors: | LI Juan ZHAO Jun |
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| Affiliation: | (College of Geography and Environment Science of North West Normal University,Lanzhou 730000, China ) |
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| Abstract: | The directly derived landform information can hardly meet the acquisition for the influence of multi\|scales of DEM, the macroscopic and diversity of terrain.At the same time, the precision is uncertain using DEM to extract slope.Taking typically physiographic plain and upland of northwest droughty area for example and using 1:10000 and 1:50000 scale DEM ,the slope driving results are compared and the variation rules are analyzed.The error of slope-extraction in quantity are simulated. |
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| Keywords: | DEM Northwest drought area Slope-extraction Analysis |
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