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


It is very common for spatial applications to try to do many of the data management tasks that can be done in the database more efficiently. In this chapter, we have discussed many common database features useful for the spatial applications. We have shown examples of when these features can be useful for spatial applications along with several code examples. The data consistency check is a common task that is traditionally done in a GIS, but these can be done at the database using triggers as shown in this chapter. We learned how to use materialized views to reduce the cost associated with the repeated query operations. We explained the database replay used to replay the workload captured on a production system on other systems. The versioning of spatial objects is another common operation that is usually managed by a GIS. Oracle provides the Workspace Manager technology to manage the different versions of spatial data, and we also described the storage options for the SDO_GEOMETRY...