メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.136767039055 42.9779645867083, 144.136740413618 42.9779959706025, 144.136634687204 42.9781155159211, 144.133740936659 42.9766532384803, 144.13487566855 42.9754221509504, 144.135009927605 42.9754842191764, 144.137785543369 42.9767675265525, 144.136767039055 42.9779645867083)) ^^http://www.opengis.net/ont/geosparql#wktLiteral