NOTICE:  CG_ApproximateMedialAxis with projected=true requires SFCGAL 2.3.0+, falling back to non-projected result.
square_proj_true|SRID=3857;MULTILINESTRING EMPTY
NOTICE:  CG_ApproximateMedialAxis with projected=true requires SFCGAL 2.3.0+, falling back to non-projected result.
rect_proj_true|SRID=3857;MULTILINESTRING((0.5 0.5,1.5 0.5))
