ST_GetUnProjectedTransformDefinition method for type ST

ST_SpatialRefSys::ST_GetUnProjectedTransformDefinition(transform-definition)

Name	Type	Description
transform-definition	LONG VARCHAR	The spatial reference system transform definition text

LONG VARCHAR Returns a text string defining the transform definition of the unprojected spatial reference system.

If the transform-definition parameter defines a projected spatial reference system, returns the definition of the source spatial reference system.

The following example returns the result +proj=latlong +a=6371000 +b=6371000 +no_defs.

SELECT ST_SpatialRefSys::ST_GetUnProjectedTransformDefinition( '+proj=robin +lon_0=0 +x_0=0 +y_0=0 +a=6371000 +b=6371000 +units=m  no_defs' )