基于全球剖分模型的空间信息编码模型初探

Preliminary Studies on Geospatial Information Code Model Based on Global Subdivision Model

为解决由于不同GIS数据模型中同一空间实体的编码不惟一而导致数据共享困难及标识的静态性和无空间位置等问题,鉴于全球剖分模型的全球连续性、多层次性以及剖分面片地址码的全球惟一性,该文提出了基于全球剖分模型的全球空间信息剖分编码(GeoDNA)模型,并设计了该编码模型的系统架构,试图实现全球空间信息的全息表达。通过对遥感影像中的空间实体进行编码试验,表明全球空间信息剖分编码模型将大大增强空间信息的维护与共享能力,加快信息的查询与检索速度,在区域性的应急反应上具有很强的理论和实用价值。

Considering existing data models of GIS applications,identification of the same geospatial object is usually not the same in different application systems,and the object＇s identification is always static and lack of geospatial information such as position and scale. These hinder the data sharing in GIS. To solve these problems caused by objects＇ IDs,a new universal code of global geospatial information,GeoDNA, is put forward based on global subdivision model （GSM） and the universal coding archi- tecture is designed. Spatial objects＇ GeoDNA that combines subdivision cell＇s address identifier with object feather code is u- nique in the world,and may express continuous and multi-scale global geospatial information due to the hierarchical and continu- ous property of GSM. At the last part, an example of encoding objects in a remote sensing image is presented, and the results show that GeoDNA on global geospatial information enhances data sharing capacity in GIS and improves efficiency of global massive data storage and management, which is of theoretical and applied value in regional emergency response.