メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9187500 33.3166667, 130.9250000 33.3166667, 130.9250000 33.3208334, 130.9187500 33.3208334, 130.9187500 33.3166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral