メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.262432540525 44.0275608497282, 144.261138611788 44.027108460633, 144.261477000383 44.0265966231567, 144.262787234023 44.02704728352, 144.262781472622 44.0270555109395, 144.262432540525 44.0275608497282)) ^^http://www.opengis.net/ont/geosparql#wktLiteral