Book Image

Applying and Extending Oracle Spatial

By : Siva Ravada, Simon Greener
Book Image

Applying and Extending Oracle Spatial

By: Siva Ravada, Simon Greener

Overview of this book

Spatial applications should be developed in the same way that users develop other database applications: by starting with an integrated data model in which the SDO_GEOMETRY objects are just another attribute describing entities and by using as many of the database features as possible for managing the data. If a task can be done using a database feature like replication, then it should be done using the standard replication technology instead of inventing a new procedure for replicating spatial data. Sometimes solving a business problem using a PL/SQL function can be more powerful, accessible, and easier to use than trying to use external software. Because Oracle Spatial's offerings are standards compliant, this book shows you how Oracle Spatial technology can be used to build cross-vendor database solutions. Applying and Extending Oracle Spatial shows you the clever things that can be done not just with Oracle Spatial on its own, but in combination with other database technologies. This is a great resource book that will convince you to purchase other Oracle technology books on non-spatial specialist technologies because you will finally see that "spatial is not special: it is a small, fun, and clever part of a much larger whole".
Table of Contents (20 chapters)
Applying and Extending Oracle Spatial
About the Authors
About the Reviewers
Table Comparing Simple Feature Access/SQL and SQL/MM–Spatial


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...