メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2562500 24.9041667, 125.2625000 24.9041667, 125.2625000 24.9083333, 125.2562500 24.9083333, 125.2562500 24.9041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral