ST_Length3D_Spheroid — Calculates the length of a geometry on an ellipsoid, taking the elevation into account. This is just an alias for ST_Length_Spheroid.
float ST_Length3D_Spheroid(geometry  a_linestring, spheroid  a_spheroid);
Calculates the length of a geometry on an ellipsoid, taking the elevation into account. This is just an alias for ST_Length_Spheroid.
| ![[Note]](images/note.png) | |
| Will return 0 for anything that is not a MULTILINESTRING or LINESTRING | 
| ![[Note]](images/note.png) | |
| This functionis just an alias for ST_Length_Spheroid. | 
 This function supports 3d and will not drop the z-index.
 This function supports 3d and will not drop the z-index.