メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.9500000 32.8166667, 129.9562500 32.8166667, 129.9562500 32.8208334, 129.9500000 32.8208334, 129.9500000 32.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral