The INFORMATION_SCHEMA ST_SPATIAL_REFERENCE_SYSTEMS Table The column data type. Permitted values are:  geometry ,  point ,  linestring ,  polygon ,  multipoint , multilinestring ,  multipolygon ,  geometrycollection . This column is a MySQL extension to the standard. The  ST_SPATIAL_REFERENCE_SYSTEMS  table provides information about available spatial reference systems (SRSs) for spatial data. This table is based on the SQL/MM (ISO/IEC 13249-3) standard. Entries in the  ST_SPATIAL_REFERENCE_SYSTEMS  table are based on the European Petroleum Survey Group (EPSG) data set, except for SRID 0, which corresponds to a special SRS used in MySQL that represents an infinite flat Cartesian plane with no units assigned to its axes. For additional information about SRSs, see Section 11.4.5, “Spatial Reference System Support” . The  ST_SPATIAL_REFERENCE_SYSTEMS  table has these columns: The spatial reference system name. This value is unique. The spatial reference system numeric ID. This value is unique. SRS_ID  values represent the same kind of values as the SRID of geometry values or passed as the SRID argument to spatial functions. SRID 0 (the unitless Cartesian plane) is special. It is always a legal spatial reference system ID and can be used in any computations on spatial data that depend on SRID values. The name of the organization that defined the coordinate system on which the spatial reference system is based. The numeric ID given to the spatial reference system by the organization that defined it. The spatial reference system definition.  DEFINITION  values are WKT values, represented as specified in the Open Geospatial Consortium document OGC 12-063r5. SRS definition parsing occurs on demand when definitions are needed by GIS functions. Parsed definitions are stored in the data dictionary cache to enable reuse and avoid incurring parsing overhead for every statement that needs SRS information. The spatial reference system description. •The  SRS_NAME ,  ORGANIZATION ,  ORGANIZATION_COORDSYS_ID , and  DESCRIPTION  columns contain information that may be of interest to users, but they are not used by MySQL. • DESCRIPTION • DEFINITION • ORGANIZATION_COORDSYS_ID • ORGANIZATION • SRS_ID • SRS_NAME 26.3.36 The INFORMATION_SCHEMA ST_SPATIAL_REFERENCE_SYSTEMS Table Notes 4824