メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.046325616739 42.9193724834399, 143.044820263618 42.9192800287532, 143.044993080267 42.9180293834187, 143.045780029863 42.9180796298738, 143.046505301324 42.9181260065746, 143.046325616739 42.9193724834399)) ^^http://www.opengis.net/ont/geosparql#wktLiteral