メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((125.3000000 24.8541667, 125.3062500 24.8541667, 125.3062500 24.8583333, 125.3000000 24.8583333, 125.3000000 24.8541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral