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

Inserting, modifying, and deleting coordinates

The description of a spatial object is controlled by the Open Geospatial Consortium and International Organization for Standardization (ISO) standard bodies. In particular, the ISO/IEC 13249-3 Part 3: Spatial (ISO 13249-3, Information technology - Database languages - SQL Multimedia and Application Packages - Part 3: Spatial.) and the related OGC Simple Features Access – Part 2: SQL Option (OpenGIS® Implementation Specification for Geographic information - Simple feature access - Part 2: SQL option, Version 1.1 and 1.2. Previously known as Simple Features–SQL) (known as SFA). These standards define how a polygon and its exterior and interior rings are defined and how it is to be encoded.

Similarly, these standards describe the functionality that must be made available for conforming implementations. But there are a number of functions not described or required by the current standards that are most useful...