Oracle Spatial and Graph, often referred to as Spatial and Graph, includes advanced features for spatial data and analysis and for physical, logical, network, and social and semantic graph applications. The spatial features provide a schema and functions that facilitate the storage, retrieval, update, and query of collections of spatial features in an Oracle database. Spatial and Graph consists of the following:
A schema (MDSYS) that prescribes the storage, syntax, and semantics of supported geometric data types
A spatial indexing mechanism
Operators, functions, and procedures for performing area-of-interest queries, spatial join queries, and other spatial analysis operations
Functions and procedures for utility and tuning operations
Topology data model for working with data about nodes, edges, and faces in a topology (described in Oracle Spatial and Graph Topology Data Model and Network Data Model Graph Developer's Guide).
Network data model for representing capabilities or objects that are modeled as nodes and links (vertices and edges) in a graph (described in Oracle Spatial and Graph Topology Data Model and Network Data Model Graph Developer's Guide).
GeoRaster, a feature that lets you store, index, query, analyze, and deliver GeoRaster data, that is, raster image and gridded data and its associated metadata (described in Oracle Spatial and Graph GeoRaster Developer's Guide).
The spatial component of a spatial feature is the geometric representation of its shape in some coordinate space. This is referred to as its geometry.
Note:
Do not modify any packages, tables, or other objects under the MDSYS schema. (The only exception is if you need to create a user-defined coordinate reference system, as explained in Creating a User-Defined Coordinate Reference System.)