メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.421961366004 43.0549108005309, 141.42233429999 43.0552635295927, 141.42274840638 43.0556501025646, 141.423105046458 43.0559813308294, 141.422012774044 43.0566237859488, 141.421935748217 43.0566746403383, 141.421607035068 43.0568916242432, 141.42121169933 43.0571202215064, 141.420843995521 43.0567915795597, 141.42041367857 43.0563908860418, 141.420019582846 43.0560356763672, 141.419639833799 43.0556766308717, 141.420032067879 43.0554362004956, 141.420423892143 43.0551904211074, 141.42153456963 43.0545485369949, 141.421961366004 43.0549108005309)) ^^http://www.opengis.net/ont/geosparql#wktLiteral