基态修正的GIS数据库增量更新建模

为了对GIS数据库增量更新中的增量信息、版本数据库进行组织和管理,本文采用基态修正模型,将版本数据作为基态、版本数据对应的增量信息作为修正,分别设计了其存储的数据结构,并给出了基于该模型的增量更新流程。以1∶2000地形图数据的增量更新为例,开发了空间数据库增量更新原型系统,实现了多个增量信息文件的组织存储、快速集成到历史数据中,能够满足GIS数据库增量更新的需求。

Spatial database incremental updating modeling based on base state with amendments

To manage the incremental information and historical database in GIS incremental updating,the base state with amendments model was introduced in this paper.The historical database was regarded as base state while the incremental information was treated as amendments,and data structure was designed to store the data.What’s more,incremental update process was given based on this model to show how to get the new version database.Finally,a prototype system for spatial incremental updating was developed and implemented with 1∶2000 topographic databases.Experimental results showed that using the model presented in this paper could store incremental files effectively,and integrate the incremental information into the old databases quickly,to meet the need of spatial database incremental update.