WebGIS中的地理关系数据库模型研究

目前，传统的ＧＩＳ将属性与空间数据分离开来的组织模型已经不能满足ＧＩＳ数据管理的需要，而面向对象的数据库（ＯＯＤＢ）组织模型又未成熟。因此，该文研究了将空间与属 数据统一存放在关系数据库中进行管理的技术，建立了用于ＷｅｂＧＩＳ的地理关系数据库模型，并在ＷｅｂＧＩＳ中得到了原型实现。

Research on Geographical Relational Database Model in WebGIS

The requirement of GISs' data management demands a universal organization model instead of the conventional spatial and attribute departed data management model. The OODB organization technique is far from mature. Under this condition, a research on how to manage the attribute and spatial data in a universal way in the RDB was conducted. The organization of the spatial database is illustrated in four parts: the total database level table used to maintain the whole spatial data; the atlas table used to maintain the layers' information in a project; the map table used to maintain the layer information; the spatial index table used to store the spatial index information among a layer. The storage process of spatial data is illustrated through spatial data storage and spatial data calculation. A Geographical Relational Database Model was constructed and implemented in WebGIS.