メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1187500 33.1333333, 130.1250000 33.1333333, 130.1250000 33.1375000, 130.1187500 33.1375000, 130.1187500 33.1333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral