Summary
Replicating or maintaining the different versions or copies of the spatial data is often left to the GIS application. However, there are several easy ways to implement features that can be used to manage this replication at the database level. In this chapter, we discussed several techniques for replicating data at the table, schema, and database level. We showed examples for streams and materialized view based replication. We explained the logical and physical standby features in the context of replication. We also covered the concepts of OLAP and Spatial OLAP and described how a geometric hierarchy can be used in SOLAP to enrich the queries that can be executed in the traditional OLAP. The examples demonstrated how the spatial hierarchies can be used without executing any expensive spatial operations at runtime.
In the next chapter, we'll describe the concept of Oracle partitioning that can be used to achieve manageability and high performance while dealing with very large tables...