メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5937500 35.2583333, 132.6000000 35.2583333, 132.6000000 35.2625000, 132.5937500 35.2625000, 132.5937500 35.2583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral