| 基于计曲线的DEM生成与地形分析——以在黄土高原的试验为例 |
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| 引用本文： | 杨昕,汤国安,刘咏梅,张友顺,陈卫荣.基于计曲线的DEM生成与地形分析——以在黄土高原的试验为例[J].水土保持通报,2003,23(3):48-50,54. |
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| 作者姓名： | 杨昕 汤国安 刘咏梅 张友顺 陈卫荣 |
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| 作者单位： | 西北大学,城市与资源学系,陕西,西安,710069 |
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| 基金项目： | 国家自然科学基金 (40 2 71 0 89)，教育部科研基金重点项目，测绘遥感信息工程国家重点实验室高级访问学者基金项目 |
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| 摘 要： | 数字高程模型(DEM)是水土流失监测与水土保持中地形分析不可缺少的空间数据，但是，目前国家测绘部门1：1万比例尺DEM的完成尚待时日。提出了利用计曲线快速生成DEM的技术方法，并以黄土丘陵区为试验样区，评定其精度特征与应用适宜性。实验结果表明，该方法生成的DEM同首曲线数字化生成的DEM相比，建立的效率大为提高，精度有保证，能够满足黄土高原地区一般地形分析的需要，不失为一种快速、简洁、有效的技术方法。
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| 关 键 词： | 计曲线 DEM 建立 精度 |
| 文章编号： | 1000-288X(2003)03-0048-03 |
| 收稿时间： | 2002/12/20 0:00:00 |
| 修稿时间： | 2003/3/12 0:00:00 |
Accuracy Analysis and Production of DEM Based on Index Contour |
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| YANG Xin,TANG Guoan,LIU Yongmei,ZHANG Youshun and CHEN Weirong.Accuracy Analysis and Production of DEM Based on Index Contour[J].Bulletin of Soil and Water Conservation,2003,23(3):48-50,54. |
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| Authors: | YANG Xin TANG Guoan LIU Yongmei ZHANG Youshun and CHEN Weirong |
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| Abstract: | DEMs play an important role in the supervision and preservation of soil and water conditions, but at present, it is difficult to construct large scale DEMs. An idea and technical method to construct a DEM based on index contour is put forward for the first time. Using loess hilly and gully area as test sites, the authors assessed the accuracy and application feasibility of this type of DEM. The experiment shows that although there are some certain errors in these simplified DEMs, as well as in the terrain features derived (i.e slope, aspect, surface curvature, donga density, surface roughness and undulation), these DEMs can satisfy the application and analysis of terrain. It is a quick, concise and effective technical method. |
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| Keywords: | index contour DEM construction accuracy |
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