メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.958450171764 43.545428294443, 144.957579716335 43.5448629980288, 144.958387644916 43.5442189269421, 144.958756269754 43.5444629477135, 144.959252989998 43.5447824386953, 144.958450171764 43.545428294443)) ^^http://www.opengis.net/ont/geosparql#wktLiteral