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| 水土流失定量监测中的DEM精度评价新方法 | |
| 引用本文： | 卜兆宏,杨晓勇,王库,杨林章,张祖兴,朱克诚,钱惠康.水土流失定量监测中的DEM精度评价新方法[J].土壤学报,2004,41(5):661-668. |
| 作者姓名： | 卜兆宏 杨晓勇 王库 杨林章 张祖兴 朱克诚 钱惠康 |
| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008 2. 水利部海河水利委员会科技咨询中心,天津,300170 3. 江苏省水利厅水土保持办公室,南京,210029 |
| 基金项目： | 国家自然科学基金(No.40171060)和中国科学院知创新工程项目(KZCX2-413)资助 |
| 摘 要： | 提出了由像元坡度评价法和数值评价法组成的DEM精度评价新方法 ,介绍了它在两类DEM实验区应用的结果 ,显示了它在DEM精度评价中具有准确可靠、快速直观、评价客观、精度数值符合DEM实际的特点 ,并能醒目突显DEM的局部错误 ,使其能用DEM构建文件改正后建成较高精度的DEM。该评价新方法 ,已在江苏全省和密云水库流域DEM建成中得到充分应用和证明。 |
| 关 键 词： | DEM精度 像元坡度图 评价新方法 |
| 收稿时间： | 2003/12/4 0:00:00 |
| 修稿时间： | 2004/2/16 0:00:00 |
NEW METHOD FOR ACCURACY EVALUATION OF DEM |
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| Bu Zhaohong,Yang Xiaoyong,Wang Ku,Yang Linzhang,Zhang Zuxing,Zhu Kecheng and Qian Huikang.NEW METHOD FOR ACCURACY EVALUATION OF DEM[J].Acta Pedologica Sinica,2004,41(5):661-668. | |
| Authors: | Bu Zhaohong Yang Xiaoyong Wang Ku Yang Linzhang Zhang Zuxing Zhu Kecheng and Qian Huikang |
| Institution: | Bu Zhaohong1 Yang Xiaoyong2 Wang Ku1 Yang Linzhang1 Zhang Zuxing2 Zhu Kecheng3 Qian Huikang3 |
| Abstract: | A new method was proposed to evaluate the accuracy of DEM by combining the pixel slope evaluation method with numerical value evaluation method. Results obtained from two types of DEM experiment sites, the Miyun Reservoir in Beijing and Jiangsu Province showed that the new method for DEM evaluations was characterized by credibility, accuracy, quickness, intuitiveness, and objectivity, and could quickly turn out a precise DEM after correcting a few mistakes in general imaginary of DEM. The accurate values are true to the reality. Since the method can make errors standing out in DEM and hence easy to correct, it is very useful to work out a precise, intuitionistic and actual DEM. The new method has been fully proved in establishing DEM of Jiangsu Province and the upstream region of the Miyun Reservoir in the Haihe watershed. |
| Keywords: | DEM Accuracy evaluation Slope map of pixels |
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