User's Guide and Reference

Spatial reference system identifier

The spatial reference system identifies the coordinate transformation for each geometry.

All spatial reference systems known to the database can be accessed through the DB2GSE.SPATIAL_REF_SYS catalog view. For information about this view, see Catalog views.

The ST_SRID function takes a geometry and returns its spatial reference identifier as an integer. For more information, see ST_SRID.

The ST_Transform function assigns a geometry to a spatial reference system other than the spatial reference system to which the geometry is currently assigned. For more information, see ST_Transform.


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