メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.985302773647 43.5597328719853, 144.984781041622 43.5601095432817, 144.984663218156 43.5600017527983, 144.9838402722 43.559355465221, 144.984368012798 43.5589193411753, 144.98504483708 43.5588159430563, 144.985302773647 43.5597328719853)) ^^http://www.opengis.net/ont/geosparql#wktLiteral