| 王浩宇,胡吉平,谭衢霖,徐潇.山区等高线内插生成DEM的精度评价[J].地质找矿论丛,2014,29(3):433-437 |
| 山区等高线内插生成DEM的精度评价 |
| Evaluation of the contour line interpolation-generated DEMs of mountainous area in north China |
| 投稿时间：2013-04-27 修订日期：2013-07-26 |
| DOI：10.6053/j.issn.1001-1412.2014.03.019 |
| 中文关键词: 矢量化 等高线 DEM 内插 精度评价 |
| 英文关键词:vectorize contour line DEM interpolation accuracy assessment |
| 基金项目:国家自然科学基金项目（编号：51078020）、中央高校基本研业务费专项项目（编号：2012JBM078）资助。 |
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| 中文摘要: |
| 文章以中国北方山区为试验研究区，对其大比例尺地形图进行了等高线矢量化，利用典型的3种内插算法分别建立DEM。然后采用数值精度指标结合显著性检验进行精度定量分析，并辅以视觉特征上能够体现插值质量的方法（地形属性可视化分析和等高线分析）对生成的DEM进行质量评价。结果表明，TIN方法生成的DEM精度最高，且晕渲图能够较好地反映山区的真实地形，由其回放的等高线与原始等高线吻合度高；相对高差越大，TIN插值较IDW插值的优越性越明显。 |
| 英文摘要: |
| Study area is situated in mountains of north China. Contour of topographic map at large scale is vectorized and three classic interpolation algorithms were adopted to establish DEMs. Numerical precision indicators with statistical test were used to evaluate accuracy for the generated DEMs. Meanwhile, visual comparison was performed to validate quality of DEMs. The results show that the TIN-DEM method produces the highest accuracy. Its hill-shading map can reflect the true mountainous terrain much better. And the extracted contours are highly consistent with the original real terrain contours. The greater the relative height, the superior of TIN interpolation to IDW interpolation is more obvious. |
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