メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4937500 33.5083333, 133.5000000 33.5083333, 133.5000000 33.5125000, 133.4937500 33.5125000, 133.4937500 33.5083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral