2 GeoRaster Data Types and Related Structures
The object-relational implementation of GeoRaster consists of a set of object data types for storing data and system data.
Each image or gridded raster data is stored in a column of type SDO_GEORASTER, and the blocks in that raster data are stored in a raster data table of type SDO_RASTER, as explained and illustrated in GeoRaster Physical Storage. This chapter contains the following major sections.
- SDO_GEORASTER Object Type
In the GeoRaster object-relational model, a raster image or grid object is stored in a single row, in a single column of object type SDO_GEORASTER in a user-defined table. Tables with at least one column of type SDO_GEORASTER are referred to as GeoRaster tables. - SDO_RASTER Object Type and the Raster Data Table
In the GeoRaster object-relational model, a raster data table (RDT) is used to store all cell data in a raster image. - Other GeoRaster Types
GeoRaster also porvides some other data types. - GeoRaster System Data Views (xxx_SDO_GEOR_SYSDATA)
GeoRaster uses a system data table (also called the sysdata table) to maintain the relationship between GeoRaster tables and their related raster data tables. - GeoRaster XML Schema
GeoRaster defines an XML schema to store and manage the GeoRaster metadata.