メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.383985339481 42.9831824818139, 144.381554518431 42.9827565078065, 144.381750223471 42.982089321552, 144.382639701138 42.9820901701704, 144.382564331558 42.9823203499681, 144.384163413796 42.9825988183311, 144.383985339481 42.9831824818139)) ^^http://www.opengis.net/ont/geosparql#wktLiteral