メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.8187500 34.6916667, 133.8250000 34.6916667, 133.8250000 34.6958334, 133.8187500 34.6958334, 133.8187500 34.6916667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral