メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.701577070302 44.3621644006488, 141.700986074182 44.3625507835673, 141.700844928311 44.3624413256067, 141.700292950027 44.3620137863518, 141.699969366334 44.361762219712, 141.700574266195 44.3613770700368, 141.701577070302 44.3621644006488)) ^^http://www.opengis.net/ont/geosparql#wktLiteral