メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.0187500 27.7333333, 129.0250000 27.7333333, 129.0250000 27.7375000, 129.0187500 27.7375000, 129.0187500 27.7333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral