メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.321791699027 34.8694483125419, 138.322033811569 34.8698935186146, 138.322251613662 34.8703164318127, 138.321235578601 34.870508084582, 138.320327424646 34.8707070084345, 138.319862571299 34.8708359983189, 138.319619549648 34.8708415612468, 138.319483787436 34.8708207264636, 138.319863834303 34.8702379620957, 138.320269018978 34.8695845857198, 138.320519998809 34.86918728637, 138.320799633963 34.8687575583996, 138.321212719428 34.8685247398687, 138.321543672487 34.8690527575512, 138.321779987708 34.8694296311114, 138.321791699027 34.8694483125419)) ^^http://www.opengis.net/ont/geosparql#wktLiteral