メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.891420732362 37.0563980500462, 140.889582628098 37.0561979747181, 140.889803470322 37.0547567926631, 140.891642141662 37.0550064224631, 140.891486153276 37.0557838792823, 140.891436451404 37.0561703843898, 140.891420732362 37.0563980500462)) ^^http://www.opengis.net/ont/geosparql#wktLiteral