メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.2187500 26.5833333, 127.2250000 26.5833333, 127.2250000 26.5875000, 127.2187500 26.5875000, 127.2187500 26.5833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral