メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.9187500 37.0375000, 140.9250000 37.0375000, 140.9250000 37.0416667, 140.9187500 37.0416667, 140.9187500 37.0375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral