メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.8062500 35.0708334, 133.8125000 35.0708334, 133.8125000 35.0750000, 133.8062500 35.0750000, 133.8062500 35.0708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral