メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.345276123319 43.1439011885946, 141.345727932527 43.143821690345, 141.346149792521 43.1437475098013, 141.346527898954 43.1452636687865, 141.346622313245 43.1456423560606, 141.345715181196 43.1457644055347, 141.345286634126 43.1458220753359, 141.344010814337 43.1459931849761, 141.34389071898 43.1454943133139, 141.343813274866 43.1451448037134, 141.343729341346 43.1447925700858, 141.343654751903 43.1444515923851, 141.343576409344 43.1441110773616, 141.345276123319 43.1439011885946)) ^^http://www.opengis.net/ont/geosparql#wktLiteral