Locator

From Oracle FAQ

Oracle Locator is a scaled down "free" version of Oracle Spatial.

Functionality provided

Locator includes the data types, operators, and indexing capabilities of Oracle Spatial, along with a limited set of the functions and procedures of Spatial. The Locator features include the following:

An object type (SDO_GEOMETRY) that describes and supports any type of geometry
A spatial indexing capability that lets you create spatial indexes on geometry data
Spatial operators that use the spatial index for performing spatial queries
Some geometry functions and the SDO_AGGR_MBR spatial aggregate function
Coordinate system support for explicit geometry and layer transformations (SDO_CS.TRANSFORM function and SDO_CS.TRANSFORM_LAYER procedure)
Tuning functions and procedures (SDO_TUNE package)
Spatial utility functions (SDO_UTIL package)
Integration with Oracle Application Server

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