[1]陈楠,汤国安,朱红春.不同空间分辨率DEM提取坡度不确定性研究[J].水土保持研究,2006,13(03):153-156.
　CHEN Nan,TANG Guo-an,ZHU Hong-chun.The Study on the Uncertainty of Slope Information Derived from DEM with Different Spatial Resolutions[J].Research of Soil and Water Conservation,2006,13(03):153-156.
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不同空间分辨率DEM提取坡度不确定性研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 13 期数: 2006年03期 页码: 153-156 栏目: 出版日期: 1900-01-01
Title:
The Study on the Uncertainty of Slope Information Derived from DEM with Different Spatial Resolutions
作者:
陈楠1, 汤国安2, 朱红春3
1. 福州大学福建省空间信息工程研究中心, 福州 350003;
2. 南京师范大学地理科学学院, 南京 210097;
3. 山东科技大学地球信息科学与工程学院, 山东青岛 266510
Author(s):
CHEN Nan1, TANG Guo-an2, ZHU Hong-chun3
1. Spatial Information Research Center, Fuzhou University, Fuzhou 350003, China;
2. College of Geography, Nanjing Normal University, Nanjing 210097, China;
3. Shandong University of Science and Technology, Qingdao 266510, China
关键词:
数字高程模型; 不确定性; 坡度; 误差
Keywords:
DEM; uncertainty; slope; error
分类号:
TP79
摘要:
运用信息论与统计学一些指标及比较分析的方法，以1：1万DEM为研究对象。定性地分析了在黄土丘陵沟壑区DEM空间分辨率对所提取的坡度信息的不确定性影响，并建立了定量的计算公式。研究提出了不同分辨率提取坡度面积的误差评价指标，并找到了一个经验公式，该公式可以根据现有误差计算所需要的分辨率大小，这可以在保证坡度信息精度条件下减小数据量，节约成本。
Abstract:
Taking DEM of 1:10000 map scaled as the research object and adopting entropy and some indexes and comparing methods in statistics.A qualitative analysis of the effects of spatial resolutions on the uncertainty of the derived slope in loess hill and gully area information is conducted with the quantitative mathematical formula established.The study proposes the evaluating criteria of the area errors of slope derived from DEM with different spatial resolutions.An experience formula is found that can be used to compute the resolution needed according to current errors, which will decrease the quantity of data and cut down the cost while ensuring the accuracy of slope information.

参考文献/References:

[1] 李大军, 龚健雅, 邹时林, 等.未知误差分布的熵不确定度[J].测绘通报, 2002, (12):5-7.
[2] 陈楠, 汤国安, 刘咏梅, 等.基于不同比例尺的DEM地形信息比较[J].西北大学学报, 2003, 33(2):237-240.
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[6] 汤国安, 赵牡丹, 李天问, 等.提取黄土高原地面坡度的不确定性[J].地理学报, 2003, 58(6):824-830.
[7] 汤国安, 陈正江, 赵牡丹, 等.ArcView地理信息系统空间分析方法[M].北京:科学出版社, 2002.
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[9] 闾国年, 钱亚东, 陈钟明.基于栅格数字高程模型自动提取黄土地貌沟沿线技术研究[J].地理科学, 1998, 18(6):567-573.
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备注/Memo

收稿日期:2005-8-2
基金项目:国家自然科学基金资助项目（40271089）（、40301027）；教育部科研基金重点项目（01111）
作者简介:陈楠（1975- ），男，福建厦门人，博士，从事地理信息系统方面研究。

更新日期/Last Update: 1900-01-01