メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.374516192005 43.0723490047014, 141.374212879819 43.0725896018028, 141.374176980137 43.0726180215587, 141.373411691224 43.0734276341436, 141.372706200818 43.0733258799859, 141.372077624528 43.0732395503388, 141.372346519307 43.0721580472694, 141.372408722501 43.0718528017718, 141.372520418572 43.0714136773762, 141.372569401301 43.0712213507685, 141.374516192005 43.0723490047014)) ^^http://www.opengis.net/ont/geosparql#wktLiteral