CG_3DDistance — Computes the minimum 3D distance between two geometries
double precision CG_3DDistance( geometry geomA ,  geometry geomB );
Computes the minimum 3D distance between two geometries.
Performed by the SFCGAL module
                 
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                 NOTE: this function returns a double precision value representing the 3D distance.  | 
            
Availability: 3.5.0
            
 Questo metodo richiede il backend SFCGAL. 
            
 Questa funzione supporta i Triangoli e le Triangulated Irregular Network Surfaces (TIN). 
SELECT CG_3DDistance('LINESTRING(-1.0 0.0 2.0,1.0 0.0 3.0)', 'TRIANGLE((-4.0 0.0 1.0,4.0 0.0 1.0,0.0 4.0 1.0,-4.0 0.0 1.0))');
        cg_3ddistance
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        1
        (1 row)