メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0000000 33.1291667, 130.0062500 33.1291667, 130.0062500 33.1333333, 130.0000000 33.1333333, 130.0000000 33.1291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral