Accuracy Analysis and Production of DEM Based on Index Contour

YANG Xin; TANG Guoan; LIU Yongmei; ZHANG Youshun; CHEN Weirong

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Accuracy Analysis and Production of DEM Based on Index Contour

- Accuracy Analysis and Production of DEM Based on Index Contour
- Bulletin of Soiland Water Conservation Vol. 22, Issue 3, Pages: 48-50(2003)
- 作者机构：
  
  西北大学城市与资源学系,陕西,西安,710069
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2003
- 稿件说明：
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YANG Xin, TANG Guoan, LIU Yongmei, et al. Accuracy Analysis and Production of DEM Based on Index Contour[J]. Bulletin of Soiland Water Conservation, 2003, 22(3): 48-50.
DOI：

YANG Xin, TANG Guoan, LIU Yongmei, et al. Accuracy Analysis and Production of DEM Based on Index Contour[J]. Bulletin of Soiland Water Conservation, 2003, 22(3): 48-50. DOI：

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。

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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Related Author

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LIU Xue-jun

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WANG Chun

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Related Institution

Bureau of Hydrology, YRCC, Zhengzhou 450003, He’nan Province

State Key Joint Laboratory of Environmental Simulation and Pollution Control, Institute of Environmental Sciences, Beijing Normal University

Geographical Information Centre, School of Civil Engineering, Southwest Jiaotong University

Information Centre, Land and Resource Department of Sichuan Province

School of Geography, Beijing Normal University

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