| 陈燕,齐清文,汤国安.黄土高原坡度转换图谱研究[J].干旱地区农业研究,2004,(3):180~185 |
| 黄土高原坡度转换图谱研究 |
| Research on slope-conversion-atlas in Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2004.03.40 |
| 中文关键词: 黄土高原 坡度 图谱 DEM |
| 英文关键词:Digital Elevation Model (DEM) Loess Plateau slope atlas |
| 基金项目:国家自然科学基金资助项目(49971065)；中科院知识创新工程领域前沿项目(CXIOG-D001-01) |
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| 中文摘要: |
| 选择代表黄土高原典型地貌类型的样区,应用地学信息图谱的理论和方法,探讨了坡度信息图谱的定义、表现形式及存在原因等。经过反复试验、分析和验证,找到一个具有较理想精度的适用于黄土高原不同地貌类型的坡度转换图谱。实现对基于1∶5万地形图25m空间分辨率的DEM提取的地面坡度统计值的误差纠正,以及不同空间尺度下的DEM地面坡度精度提取。 |
| 英文摘要: |
| Slope is the basic data for the agriculture, forestry, hydrologic research and other activities of national economy. With the implementation of great exploitation and ecological environmental restoration in west region of China, it is necessary to beat out the accuracy of the slope data derived from DEM (Digital Elevation Model) in different spatial scale. From the viewpoint of geography and practical application, three typical test areas are chosen to represent the topographic features of Loess Plateau. Applying GIS, mathematical statistics and comparative laws as a basic research methodology and 1∶10000 DEM as a criterion, a research on the error simulation and the rectify method in deriving slope gradient from 1∶50000 DEM was made. An atlas of slope-correction was set up to rectify the statistical values of slope in different topographic areas of Loess Plateau, which would be of great importance in enacting referential standards in the fields of both applicable accuracy and suitable conditions of different kinds of DEM. The future work is also discussed and prospected. |
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