Download Applying and extending Oracle Spatial by Simon Greener, Siva Ravada PDF
By Simon Greener, Siva Ravada
This booklet is a sophisticated sensible advisor to utilising and increasing Oracle Spatial. This e-book is for current clients of Oracle and Oracle Spatial who've, at a minimal, uncomplicated operational adventure of utilizing Oracle or an an identical database. complex abilities will not be required
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Extra info for Applying and extending Oracle Spatial
This approach might be sufficient if the raster data is only used as backdrop images in maps. But if any raster data processing and analysis is required, storing raster data as GeoRaster objects offers many features and advantages over storing this data just as BLOBs. Loading and storing any raster data inside a database simply for the purpose of storage or visualization provides limited utility. Storing raster data for use within a transactional system has engendered a view that one must see all data as a part of a complete model; the data loaded must be seen in relation to all other data under control of that model.
There are two basic views defined to store this metadata information: USER_SDO_GEOM_METADATA and ALL_SDO_GEOM_METADATA. The USER_ view is used to create a metadata entry for a single SDO_GEOMETRY column within a database table or view. An entry must be created for each SDO_GEOMETRY column within a table; entries for SDO_GEOMETRY columns in views are optional. If a table has more than one column of type SDO_GEOMETRY, then there is one metadata entry for each column of spatial data in that table.
Once spatial data is stored in the Oracle database, it can be easily manipulated, retrieved, and related to all other data stored in the database. A spatial database should be designed just like any other database with a fully specified model. A fully specified model that is application independent should control spatial data storage. A good data model supports and enhances application access without compromising quality. In addition, database features can be used to support applications that have limited functionality when it comes to table and column design.