メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((124.2062500 24.3791667, 124.2125000 24.3791667, 124.2125000 24.3833333, 124.2062500 24.3833333, 124.2062500 24.3791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral