メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.374239725999 43.0927740828163, 141.37412702245 43.0932540551248, 141.37399737812 43.0937441655649, 141.373873552962 43.0942904359245, 141.373842523076 43.094286049827, 141.372675690462 43.0941636177635, 141.37239722938 43.0941344105435, 141.371698204958 43.0940410762557, 141.372074973075 43.0924653751894, 141.372787669633 43.0925678155823, 141.373379155069 43.092650828694, 141.373801509456 43.0927100396701, 141.374239725999 43.0927740828163)) ^^http://www.opengis.net/ont/geosparql#wktLiteral