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| 地形复杂度对坡度坡向的影响 | |
| 引用本文： | 李天文,刘学军,汤国安.地形复杂度对坡度坡向的影响[J].山地学报,2004,22(3):272-277. |
| 作者姓名： | 李天文 刘学军 汤国安 |
| 作者单位： | 1. 西北大学,城市与资源学系,陕西,西安,710069 2. 南京师范大学,地理科学学院,江苏,南京,210097;长沙理工大学公路工程学院,湖南,长沙,410076 3. 南京师范大学,地理科学学院,江苏,南京,210097 |
| 基金项目： | 国家自然科学基金(40271089)。~~ |
| 摘 要： | 采用三阶不带权差分算法，研究了地形复杂度与坡度坡向的关系，澄清了目前关于坡度坡向误差空间分布的矛盾观点，并分别在凹向椭球和高斯合成曲面数学模型曲面DEM上对其进行验证。通过研究得出：①坡度、坡向误差与坡度值正相关；②坡度坡向误差主要分布在平坦地区；③坡向误差较坡度误差对DEM高程数据误差敏感，较小的DEM误差引起较大的坡向误差。 |
| 关 键 词： | 数字高程模型 地形复杂度 坡度 坡向 |
| 文章编号： | 1008-2786(2004)03-0272-06 |
| 修稿时间： | 2004年1月5日 |
Influence of Terrain Complexity on Slope and Aspect |
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| LI Tianwen,LIU Xuejun.Influence of Terrain Complexity on Slope and Aspect[J].Journal of Mountain Research,2004,22(3):272-277. | |
| Authors: | LI Tianwen LIU Xuejun |
| Institution: | LI Tianwen~1,LIU Xuejun~ |
| Abstract: | This paper adopt Three-factorial non-power difference arithmetic to study relationship of terrain complexity and gradient derived from Digital Elevation Model (DEM), Also, the currently misunderstanding on error spatial distribution of slope and aspect derived from DEM of concave half ellipsoid and Gauss synthetical surface is clarified. We get the following conclusions: 1. error of slope and aspect is positively correlated with the calculated slope; 2.error of aspect is more sensitive to DEM uncertainty than error of slope; 3. error of slope and aspect are typical for flat areas. The conclusions obtaind from the study is also beneficial to practice work. |
| Keywords: | Digital Elevation Model(DEM) terrain complexity slope aspect |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |