メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.2687500 24.5000000, 124.2750000 24.5000000, 124.2750000 24.5041667, 124.2687500 24.5041667, 124.2687500 24.5000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral