メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.382720905836 34.9686025825713, 138.38309446801 34.9689616931885, 138.383292878794 34.9691914025669, 138.383398677514 34.9693138343189, 138.382603303063 34.9696392952246, 138.382038284036 34.9698820094884, 138.381447105231 34.9691753408692, 138.38141922854 34.9691428468325, 138.381056724665 34.9686919048541, 138.38109754914 34.9686744784558, 138.381799801091 34.9683658404212, 138.382308015703 34.9681431451041, 138.382720905836 34.9686025825713)) ^^http://www.opengis.net/ont/geosparql#wktLiteral