メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.7500000 33.0541667, 129.7562500 33.0541667, 129.7562500 33.0583333, 129.7500000 33.0583333, 129.7500000 33.0541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral