メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3187500 32.0791667, 130.3250000 32.0791667, 130.3250000 32.0833333, 130.3187500 32.0833333, 130.3187500 32.0791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral