PostGIS
Description
Returns a version of the given geometry with given ordinates swapped.
The ords parameter is a 2-characters string naming the ordinates to
swap. Valid names are: x,y,z and m.
Availability: 2.2.0
This
method supports Circular Strings and Curves.
This
function supports 3d and will not drop the z-index.
This
function supports M coordinates.
This
function supports Polyhedral surfaces.
This
function supports Triangles and Triangulated Irregular Network Surfaces
(TIN).
Example
-- Scale M value by 2
SELECT ST_AsText(
ST_SwapOrdinates(
ST_Scale(
ST_SwapOrdinates(g,'xm'),
2, 1
),
'xm')
) FROM ( SELECT 'POINT ZM (0 0 0 2)'::geometry g ) foo;
st_astext
--------------------
POINT ZM (0 0 0 4)