Oracle Spatial User's Guide and Reference - InfoLab

Parameters
Usage Notes
Examples
SDO_CS.TRANSFORM
geom
Geometry whose representation is to be transformed using another coordinate
system. The input geometry must have a valid non-null SRID, that is, a value in the
SRID column of the MDSYS.CS_SRS table (described in Section 6.4.1).
dim
Dimensional information array corresponding to geom, usually selected from one of
the xxx_SDO_GEOM_METADATA views (described in Section 2.4).
to_srid
The SRID of the coordinate system to be used for the transformation. It must be a
value in the SRID column of the MDSYS.CS_SRS table (described in Section 6.4.1).
to_srname
The name of the coordinate system to be used for the transformation. It must be a
value (specified exactly) in the CS_NAME column of the MDSYS.CS_SRS table
(described in Section 6.4.1).
Transformation can be done only between two different georeferenced coordinate
systems or between two different local coordinate systems.
An exception is raised if geom, to_srid, or to_srname is invalid. For geom to be
valid for this function, its definition must include an SRID value matching a value
in the SRID column of the MDSYS.CS_SRS table (described in Section 6.4.1).
The following example transforms the cola_c geometry to a representation that
uses SRID value 8199. (This example uses the definitions from the example in
Section 6.8.)
-- Return the transformation of cola_c using to_srid 8199
-- ('Longitude / Latitude (Arc 1950)')
SELECT c.name, SDO_CS.TRANSFORM(c.shape, m.diminfo, 8199)
FROM cola_markets_cs c, user_sdo_geom_metadata m
WHERE m.table_name = 'COLA_MARKETS_CS' AND m.column_name = 'SHAPE'
AND c.name = 'cola_c';
NAME
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Coordinate System Transformation Subprograms 15-3