| 自DEM由不同算法提取坡度的对比分析 |
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| 引用本文： | 陈楠,王钦敏,汤国安.自DEM由不同算法提取坡度的对比分析[J].测绘工程,2006,15(1):6-9. |
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| 作者姓名： | 陈楠 王钦敏 汤国安 |
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| 作者单位： | 福州大学,福建省空间信息工程研究中心,福建,福州,350003;南京师范大学,地理信息科学江苏省重点实验室,江苏,南京,210097 |
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| 基金项目： | 中国科学院资助项目
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教育部科学技术研究项目 |
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| 摘 要： | 以陕北韭园沟流域1:10 000水平分辨率为5 m的DEM为研究对象,运用方差分析、回归分析、排序分析等分析方法,采用6种不同算法分别提取坡度。通过比较不同算法所提取坡度的平均值、最大值、标准差、坡度的中误差,定量分析中误差与地形变化的关系后,提出在黄土丘陵沟壑区提取坡度时选用三阶反距离平方权差分算法和三阶反距离权差分较为合理。
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| 关 键 词： | 数字高程模型 算法 坡度 中误差 |
| 文章编号： | 1006-7949（2006）01-0006-04 |
| 收稿时间： | 2005-10-18 |
| 修稿时间： | 2005年10月18日 |
A contrast analysis of slopes extracted by different algorithms based on DEM |
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| CHEN Nan,WANG Qin-min,TANG Guo-an.A contrast analysis of slopes extracted by different algorithms based on DEM[J].Engineering of Surveying and Mapping,2006,15(1):6-9. |
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| Authors: | CHEN Nan WANG Qin-min TANG Guo-an |
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| Institution: | 1, Fujian Provincial, Spatial Information Research Center, Fuzhou University, Fuzhou 350003, China; 2. Jiangsu Provincial Key Laboratory of Geo-informaties, Nanjing Normal University, Nanjing 210097, China |
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| Abstract: | In Jiuyuan Guo drainage area of north Shanxi province,DEM with spatial resolution at 5m according to the map scaled at 1:10000 is taken as the research object,and 6 algorithms to extract slopes are adopted with the variance analysis,regression analysis and rank analysis employed.The slopes extracted by different algorithms are compared in such aspects as the average,maximum value,standard deviation and median error.Meanwhile,a quantitative analysis is made on the relationship between the median error and terrain variation.Based on the above analysis,a conclusion has been drawn that in Loess Hill and Gully Area,the reasonable algorithms are those of three-order inverse distance square weight difference and three-order inverse distance weight difference. |
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| Keywords: | DEM algorithmic rule slope median error |
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