一种基于GeoSOT网格的星地数据交互方法  

Interactive Method of Satellite and Earth Data Based on GeoSOT Grid

作　　者：许明魁 杨建朋 陈春华 刘光辉 XU Mingkui;YANG Jianpeng;CHEN Chunhua;LIU Guanghui(Wuhan Jiwei Spatial Information Technology Research Institute Co.,Ltd.,Wuhan 433070,China;Shenzhen Tanglang Technology Co.,Ltd.,Shenzhen 518038,China;Hubei Surveying and Mapping Engineering Institute,Wuhan 430074,China)

机构地区：[1]武汉吉威空间信息技术研究院有限公司,湖北武汉433070 [2]深圳市塘朗科技有限公司,广东深圳518038 [3]湖北省测绘工程院,湖北武汉430074

出　　处：《地理空间信息》2023年第3期36-40,共5页Geospatial Information

基　　金：精密工程与工业测量国家测绘地理信息局重点实验室开放基金资助项目(PF2017-4)。

摘　　要：由于卫星数据具有较大的数据量,数据分发传输过程中,现有的影像数据压缩技术和数据分层分块技术存在较多数据冗余,并不适合一些窄带通信,导致数据请求分发效率低下。鉴于此,提出了一种基于GeoSOT剖分网格的星地数据交互方法,以剖分网格为参考框架,利用网格编码对空间区位进行多尺度表达,计算包含关系,离散化的卫星数据基于网格编码实现多尺度按需分发;研究了分发服务模式,以满足不同用户需要;最后通过实验验证了该方法的可行性。Because of the large amount of satellite data, the existing image data compression technology and data layered block technology have more data redundancy in the process of data distribution and transmission. It’s not suitable for narrowband communication, it will cause the problem of inefficient in data request and distribution. In view of this, we put forward a interactive method of satellite and earth data based on GeoSOT global subdivision grid. Taking GeoSOT global subdivision grid as the reference frame, we used grid coding to express spatial location at multiple scales and calculate inclusion relation. We distributed the discrete satellite data on demand at multiple scales based on grid coding. Then,we studied the distribution service model, to meet the needs of different users. Finally, we verified the feasibility of this method by experiments.

关 键 词：剖分网格 网格编码 数据请求 数据分发 

分 类 号：P228[天文地球—大地测量学与测量工程]