メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.269430205726 44.0210482556621, 144.267852135397 44.0208746799148, 144.267992364076 44.0203265721032, 144.269526732119 44.0204647411376, 144.26952254931 44.0204792971495, 144.269430205726 44.0210482556621)) ^^http://www.opengis.net/ont/geosparql#wktLiteral