メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3937500 24.7333333, 125.4000000 24.7333333, 125.4000000 24.7375000, 125.3937500 24.7375000, 125.3937500 24.7333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral