メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.2562500 36.0458334, 136.2625000 36.0458334, 136.2625000 36.0500000, 136.2562500 36.0500000, 136.2562500 36.0458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral