Spatial reference system

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A spatial reference system is a set of parameters that is used to represent a geometry.

These parameters are:
  • The name of the coordinate system from which the coordinates are derived.
  • The numeric identifier that uniquely identifies the spatial reference system.
  • Coordinates that define the maximum possible extent of space that is referenced by a specified range of coordinates.
  • Numbers that, when applied in certain mathematical operations, convert coordinates received as input into values that can be processed with maximum efficiency.

The numeric identifier for a spatial reference system determines which spatial reference system is used to represent the geometry. The only spatial reference system identifier supported by Geospatial Analytics is SRS ID 4326 (WGS84_SRS_4326).

The spatial reference system is shown in the table below, along with the coordinate system on which the spatial reference system is based.

Table 1. The spatial reference system
Spatial reference system SRS ID Coordinate system
WGS84_ SRS_4326 4326 GCS_WGS _1984

Information about the spatial reference system known to the database can be accessed through the QSYS2.ST_SPATIAL_REFERENCE_SYSTEMS catalog view.