メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((126.7625000 26.3291667, 126.7687500 26.3291667, 126.7687500 26.3333333, 126.7625000 26.3333333, 126.7625000 26.3291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral