メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.3687500 34.1291667, 134.3750000 34.1291667, 134.3750000 34.1333333, 134.3687500 34.1333333, 134.3687500 34.1291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral