メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.1187500 39.8583333, 140.1250000 39.8583333, 140.1250000 39.8625000, 140.1187500 39.8625000, 140.1187500 39.8583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral