メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.957707400605 43.551055169558, 144.957479561153 43.5509072746761, 144.957165962262 43.5508046232809, 144.958218490334 43.549942957914, 144.95844604259 43.5500758799834, 144.958685813465 43.5502182154649, 144.957707400605 43.551055169558)) ^^http://www.opengis.net/ont/geosparql#wktLiteral