| 摘要: |
| 【目的】建立陕西省水文地貌关系正确的数字高程模型(Hc-DEM)，并对Hc-DEM的精度进行评价。【方法】研究快速有效地处理原始数据及生成陕西省Hc-DEM的方法。从地形的表现能力、水系网络和交叉验证等方面，对Hc-DEM与基于TIN建立的DEM（TIN-DEM）进行了对比评价。【结果】Hc-DEM能够很好地表现地形起伏，正确地反映地貌，如梁、沟及流水线网络；且其对地形的表现能力优于利用TIN建立的DEM。【结论】用ANUDEM生成的陕西省Hc-DEM能更真实地反映实际地形，比TIN-DEM效果好。生成了陕西省Hc-DEM的3个关键参数：分辨率50 m，第2糙度系数0.8，迭代次数40。 |
| 关键词: ANUDEM 数字高程模型（DEM） 陕西省 |
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| 基金项目:国家重点基础研究发展计划（973计划）项目（2007CB407204）;水土流失经验模型指标体系及孤山川流域年产沙经验模型研究（黄水保200651-08）；国家自然科学基金资助项目（41071188） |
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| Abstract: |
| 【Objective】The research was conducted to generate a hydrologically correct DEM in Shaanxi and evaluate the DEM’s accuracy.【Method】How to deal with original data rapidly and effectively was studied.From the presentations of terrain,river net and crossing validate,the Hc-DEM and DEM were assessed based on TIN (TIN-DEM).【Result】Hc-DEM can present topography well,and correctly present physiognomy,girder and chimb and stream network,the presentation for topography is better than TIN DEM.【Conclusion】The DEM which uses ANUDEM to generate can well represent the real topography,while the quality of this DEM is better than TIN-DEM.For generating the DEM,three main parameters of ANUDEM including resolution,iteration number and 2nd roughness are 50,40,and 0.8 respectively. |
| Key words: ANUDEM Digital Elevation Model (DEM) Shaanxi Province |
