メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1812500 32.7875000, 130.1875000 32.7875000, 130.1875000 32.7916667, 130.1812500 32.7916667, 130.1812500 32.7875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral