メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.2625000 24.9000000, 125.2687500 24.9000000, 125.2687500 24.9041667, 125.2625000 24.9041667, 125.2625000 24.9000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral