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遥感技术与应用  2011, Vol. 26 Issue (6): 751-757    DOI: 10.11873/j.issn.1004-0323.2011.6.751
图像与数据处理     
汶川震后震害区DEM提取方法研究—以平武县为例
杨鑫1,2,潘倩2,3,杨武年1,2,刘汉湖1,2
(1.成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都610059;
2.成都理工大学遥感与GIS研究所,四川 成都610059;3.四川省环境监测中心站,四川 成都610041)
The Method of DEM Extraction after Wenchuan Earthquake in the Earthquake Disaster Area—Take Pingwu Country for Example
Yang Xin1,2,Pan Qian2,3,Yang Wunian1,2,Liu Hanhu1,2
(1.State Key Laboratory of Geo-hazard Prevention and Geo\|environment Protection,Chengdu University of Technology,Chengdu 610059,China;2.RS & GIS Institute,Chengdu University of Technology,Chengdu 610059,China;3.Sichuan Environmental Monitoring Center,Chengdu 610041,China)
 全文: PDF(2247 KB)  
摘要:

数字高程模型(DEM)是地理信息系统的基础数据,在与地形相关的各个领域都有非常广阔的应用前景,因此,对DEM的生产和应用研究意义重大。5·12汶川特大地震导致灾区地形严重破坏,原有的地形图及DEM数据不再具备时效性;而有效的DEM数据在当时抗震救灾和灾后重建高精度正射遥感影像地图制作、三维漫游、公路交通及地质灾害信息提取和预警预报等方面又极为重要。因此,采用何种技术方法快速获取灾区震后DEM数据是当时亟待解决的问题。利用ENVI平台,以四川省平武县为实验区,选用IRS\|P5卫星遥感立体像对,尝试在不能采集到高精度地面控制点的条件下,为应急快速获取研究区震后1∶5万DEM数据的工作流程。实验结果及其精度评价表明,获取的实验区震后DEM精度达到了1∶5万或更高比例尺DEM精度标准。该研究方法及提取DEM的工作流程对类似地区应急条件下提取达到一定精度要求的DEM有实用参考价值。

关键词: IRS-P5立体像对DEM提取震害区    
Abstract:

DEM is the basis of geographic information system data,associated with the terrain in all areas has a very broad application prospects,in the production and applications of DEM,has an important significance.Wenchuan earthquake changed the existing landscape of disaster area,lead to the original DEM data and Topographic Map no longer have timeliness,the effective DEM data for earthquake relief at the time and reconstruction accuracy orthophoto imagery map production,3D roaming,road transport and geological disaster forecast and warning information extraction,etc.is extremely important.Therefore,the technical methods adopted quickly after the earthquake disaster obtain DEM data was a serious problem.In this context,this paper use ENVI platform,selected for the study area in Sichuan Province Pingwu country,select IRS\|P5 stereo pair as the main source of the data,in the emergency case of cannot be collected in high\|precision ground control points,try to get the study area 1∶50 000 DEM data after the earthquake quickly.Experimental results and the accuracy assessment show that,the experimental area for post\|earthquake DEM accuracy,reaching 1∶50 000 scale  accuracy or higher standard.This research method and process in   similar regions of emergency  conditions  to extract up to a certain precision of the DEM has practical reference value.

Key words: IRS-P5    Stereo pair    DEM extraction    Earthquake disaster area
收稿日期: 2011-07-18 出版日期: 2012-01-10
ZTFLH:  TP 79  
基金资助:

地质灾害防治与地质环境保护国家重点实验室自主研究基金项目(SKLGP2009Z004),国家自然科学基金项目(41071265)资助。

通讯作者: 杨武年(1954-),男,宁夏中卫人,博士,教授,博士生导师,主要从事3S技术及应用方面的研究。     E-mail: ywn@cdut.edu.cn。
作者简介: 杨鑫(1984-),男,宁夏中卫人,博士研究生,主要从事3S工程与数字国土方面的研究。Email:shen.198471@yahoo.com.cn。
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引用本文:

杨鑫,潘倩,杨武年,刘汉湖. 汶川震后震害区DEM提取方法研究—以平武县为例[J]. 遥感技术与应用, 2011, 26(6): 751-757.

Yang Xin,Pan Qian,Yang Wunian,Liu Hanhu. The Method of DEM Extraction after Wenchuan Earthquake in the Earthquake Disaster Area—Take Pingwu Country for Example. Remote Sensing Technology and Application, 2011, 26(6): 751-757.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2011.6.751        http://www.rsta.ac.cn/CN/Y2011/V26/I6/751

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