メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.994574136496 43.5579868270127, 144.994520025811 43.558030248087, 144.994256804347 43.5582382805304, 144.994064573618 43.5580764542881, 144.994205008032 43.5577793598606, 144.99421475474 43.5577512799838, 144.994574136496 43.5579868270127)) ^^http://www.opengis.net/ont/geosparql#wktLiteral