ArcType() ArcType defines the path connecting the vertices。 Members staticconstantSuperMap3D.ArcType.GEODESIC : Number Along the geodesic path, the enumeration value is 1 staticconstantSuperMap3D.ArcType.NONE : Number Straight lines not conforming to the ellipsoid surface, the enumeration value is 0. staticconstantSuperMap3D.ArcType.RHUMB : Number Along the thumb or loxodrome path, the enumeration value is 2.