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

Chapter 10. Integrating Java Technologies with Oracle Spatial

Chapter 6, Implementing New Functions, Chapter 7, Editing, Transforming, and Constructing Geometries, and Chapter 8, Using and Imitating Linear Referencing Functions, outlined how to embrace and extend the standard functionality available with Oracle Locator and Spatial using PL/SQL. PL/SQL is a programming language that is native to Oracle. Oracle also supports the creation of Java stored procedures. This chapter explores the application of Java to spatial processing involving the SDO_GEOMETRY type.

In this chapter, we will cover the following topics:

  • Why Java and Oracle Spatial?

  • Available Java spatial technologies

  • Matching requirements to source code project

  • Strengths and limitations of using Java

  • How to download, modify, compile, and install external libraries

  • Calling an external method

  • Converting an SDO_GEOMETRY object to a Java object

  • Exposing JTS Topology Suite functionality:

    • One-sided buffers

    • Snapping geometries

  • Building polygons...