メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.747696756155 43.1576250963216, 141.746951679618 43.157666473125, 141.746832475793 43.1565864411366, 141.746831268508 43.1565754646711, 141.746768876184 43.1559894050607, 141.747248320852 43.1559600107613, 141.747559719381 43.1560579461416, 141.747589307311 43.1565273940592, 141.747611250515 43.1567513525381, 141.747696756155 43.1576250963216)) ^^http://www.opengis.net/ont/geosparql#wktLiteral