メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2687500 24.8041667, 125.2750000 24.8041667, 125.2750000 24.8083333, 125.2687500 24.8083333, 125.2687500 24.8041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral