メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.141025012773 42.9783873622871, 144.140741968818 42.9785027386393, 144.140536140098 42.9785873698864, 144.140295979191 42.9787081552165, 144.140148822605 42.9788070776057, 144.140034854357 42.9789951216341, 144.13996084605 42.9792431995035, 144.136767039055 42.9779645867083, 144.137785543369 42.9767675265525, 144.139601507287 42.9776179221252, 144.141025012773 42.9783873622871)) ^^http://www.opengis.net/ont/geosparql#wktLiteral