メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.8687500 38.6750000, 140.8750000 38.6750000, 140.8750000 38.6791667, 140.8687500 38.6791667, 140.8687500 38.6750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral