Book Image

Applying and Extending Oracle Spatial

Book Image

Applying and Extending Oracle Spatial

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
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Table Comparing Simple Feature Access/SQL and SQL/MM–Spatial
Index

Why Java and Oracle Spatial?


PL/SQL language can be used to develop extensions with Oracle Spatial. But PL/SQL is not a common, cross-platform development language for most programmers outside the database world. Java is a good choice for such a situation. In addition, there already exist a lot of spatial algorithms that are written in Java and licensed for use as free and open source software.

Java is very much a cross-platform technology that Oracle has invested in heavily, and it runs on all platforms on which the Oracle database runs. It can be used to develop applications that can be deployed in any architectural tier (client, middle, or data). This chapter, however, looks specifically at data-tier deployment of functionality inside the Java Virtual Machine (JVM) embedded in the Oracle database.

It is the case that many existing Oracle Spatial functions provided by the Locator and Spatial products are implemented in Java. Therefore, what is promoted in this chapter is not out of the ordinary...