Each of these characteristics is likely to be stored in a separate layer, but
they can be quickly mapped to their common tiles. The designers of these spatialbased
databases can increase the resolution of the maps by increasing the number of
tiles representing the geography.
The Spatial Option fully leverages Oracle??™s object features through the use of a spatial
object type that represents single or multielement geometries. Spatial coordinates
are stored in VARRAYs.
Oracle Database 10g introduced the GeoRaster for storing, indexing, querying, analyzing,
and delivering raster image data, associated spatial vector geometry data, and
metadata. This feature enables storage of multidimensional grid layers and digital
images in an object-relational schema that are referenced to coordinate systems.
Oracle Database 11g added three-dimensional geometry objects and enhanced web
services support including business directory, Web Feature Service (WFS), Catalog
Services for the Web (CSW), and OpenLS support.
In the real world, most spatial implementations in business aren??™t custom-built from
SQL, but instead utilize purchased GIS solutions that are built on top of databases.
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