メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.330360705065 43.0480451546377, 141.330327464719 43.0483122802103, 141.33027669595 43.0486357400391, 141.330230210485 43.0489805433178, 141.330225912566 43.0490114537658, 141.328503608238 43.0488978669945, 141.328535077508 43.0486663846198, 141.328555436869 43.0485170989486, 141.328628575908 43.0479299438723, 141.328686338796 43.0475049858476, 141.330409577273 43.0476239922648, 141.330360705065 43.0480451546377)) ^^http://www.opengis.net/ont/geosparql#wktLiteral