Descrição

Para tipo geometria, retorna a menor distância cartesiana 3-dimensional entre duas geometrias em unidades projetadas (spatial ref units).

This function supports 3d and will not drop the z-index.

This function supports Polyhedral surfaces.

Disponibilidade: 2.0.0

Alterações: 2.2.0 - Em caso de 2D e 3D, o Z não é mais 0 para Z perdido.

Exemplos

-- Geometry example - units in meters (SRID: 2163 US National Atlas Equal area) (3D point and line compared 2D point and line)
-- Note: currently no vertical datum support so Z is not transformed and assumed to be same units as final.
SELECT ST_3DMaxDistance(
                        ST_Transform(ST_GeomFromEWKT('SRID=4326;POINT(-72.1235 42.3521 10000)'),2163),
                        ST_Transform(ST_GeomFromEWKT('SRID=4326;LINESTRING(-72.1260 42.45 15, -72.123 42.1546 20)'),2163)
                ) As dist_3d,
                ST_MaxDistance(
                        ST_Transform(ST_GeomFromEWKT('SRID=4326;POINT(-72.1235 42.3521 10000)'),2163),
                        ST_Transform(ST_GeomFromEWKT('SRID=4326;LINESTRING(-72.1260 42.45 15, -72.123 42.1546 20)'),2163)
                ) As dist_2d;

     dist_3d      |     dist_2d
------------------+------------------
 24383.7467488441 | 22247.8472107251

Veja também

ST_Distance, ST_3DDWithin, ST_3DMaxDistance, ST_Transform