Different from traditional information system , gis has much metadata , so dbms has to manage two kinds data : attribute data and spatial data . the author expatiate the implement of management of gis data . 5 在此部分,论文主要介绍了由专用的数据库管理系统oracle来管理业务属性数据,并讨论了oracle的空间数据模型及其空间数据库的实现,最后提出了空间数据库实现的一种简化方案。
Many attribute data such as tenement information , housing information and vehicle spot information have no conrespondant intuitionistic data in the 2d - plane gis figures , while in fact , these data occupy certain spatial geo - location 许多属性数据如住户信息、住房信息和车位信息等,在二维平面的gis图形中并没有直观的空间数据与其对应[ 27 ] ,但这部分信息又实际占据了一定的空间地理位置。
Traditional mixed data model , which manages special data in the form of files and manages attribute data in the form of relation database , is adopted during building special database ( attribute database vector and grid database ) which is the nucleus of the data bank 数据库中的核心部分?空间数据库(属性数据库与图形图像库)采用传统的混合数据模型,以文件的形式管理空间数据,以关系数据库管理属性数据。
The special data decides the relations in the location , attribute and surface features , so the databases in gis show the different ways accessing to the databases . the application system is able to get the attribute data and the special data 空间数据的存在决定了位置、属性、地物之间的相互关系等等,所以地理信息系统所相关的数据库便决定了访问该数据库方式的不同:既要得到相关的属性数据,又要得到空间数据。