基于GPS的时空场景数据库的建立与应用
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973计划项目(2007CB407203)


Building and Application of GPS-based Spatiotemporal Scene Database
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    摘要:

    基于已有的GPS数据应用研究成果,尝试了一种将GPS与数码相机相结合的,为野外考察照片添加时空信息,为GPS数据增加场景信息,从而生动再现野外考察活动和提高所拍摄照片应用水平的新方法。该方法用数码相机拍摄场景,用GPS记录点的空间地理坐标(经度、纬度、高程),根据GPS和数码相机的时间属性把GPS采集的时空数据与地面场景照片联系起来,既使场景照片具有准确的时空信息,又使GPS数据有实地场景照片。最后通过看图软件可直接浏览带有时空信息的照片,可以在Google Earth等GIS软件中浏览带有场景信息的考察路线,同时能为室内资料整理和遥感解译提供数据支撑。

    Abstract:

    Based on the current research achievements of GPS data application,a recent advance in combining GPS technology with digital camera was applied for showing fieldwork efficiently.Firstly,a photograph was taken for the GPS screen with the GPS time on it when it established a contact with satellite.The time was compared with the digital camera's time to get the difference of the time between the GPS and the digital camera.Then,photographs were taken for the scenery on the track of field work and the position was located with GPS where the photographs were taken at the same time.With the GPS receiver,spatial information of the position,including longitude,latitude,and altitude,was recorded.Finally,the time of the photographs was edited with RoboGEO software and the time of the photographs and the GPS data were kept the same based on the difference of the two kinds of time.With the common fields of the matched time,the spatial information obtained by GPS can be endowed to the photographs.Using RoboGEO software,one can export the data in various formats,such as the JPG file with the time,and the spatial information of latitude,longitude,and altitude displaying on the photographs and written into the Exif(a standard option for most digital cameras) header.Modern digital photograph management systems such as Picasa can use date,time,and location to organize and display photographs.One can also export files of tracks with located photographs to Google Earth using the KML format.With Google Earth software,one can display the track of the field work.Multiple photographs can be opened in Google Earth software and the field work and the scenery obtained by the survey can reappear.It is also possible to edit the KML file so that the photographs and data can be stored at a central web server and made available to users world wide.

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谢红霞,DavidJupp,李锐,杨勤科.基于GPS的时空场景数据库的建立与应用[J].水土保持通报,2008,(5):25-27,165

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  • 收稿日期:2008-01-17
  • 最后修改日期:2008-04-17
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  • 在线发布日期: 2014-11-26
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