メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((128.0062500 26.6083333, 128.0125000 26.6083333, 128.0125000 26.6125000, 128.0062500 26.6125000, 128.0062500 26.6083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral