メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.131229783824 43.6583991434767, 145.130897525239 43.6583579543215, 145.130700077234 43.6583447598827, 145.130087752359 43.6583045877102, 145.129813361331 43.6582865814082, 145.129670080699 43.658275887244, 145.129767873749 43.658214421863, 145.129837308755 43.6581311004769, 145.129983760665 43.6570579286265, 145.130053750969 43.6570632285284, 145.130053127799 43.6570663738295, 145.131335492694 43.6571631903753, 145.131234933511 43.6583367459748, 145.131229783824 43.6583991434767)) ^^http://www.opengis.net/ont/geosparql#wktLiteral