メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.784895255222 35.4086083199083, 136.783585845249 35.4086512337909, 136.783555092636 35.4082055176442, 136.784867673339 35.4081541635794, 136.784879922974 35.408356870829, 136.784895255222 35.4086083199083)) ^^http://www.opengis.net/ont/geosparql#wktLiteral