メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.388651644132 43.7627259661929, 142.387544534931 43.7630412420604, 142.387266236429 43.7625286630393, 142.38695854815 43.7619714281241, 142.38848132624 43.7615280966836, 142.388492633725 43.7615928314953, 142.388651644132 43.7627259661929)) ^^http://www.opengis.net/ont/geosparql#wktLiteral