メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37776669926 43.076353883034, 141.376194510908 43.0761463117318, 141.375423685549 43.0760350042814, 141.375552072566 43.0754734912712, 141.375692625591 43.0749198074482, 141.375984658587 43.0749535443, 141.377149591062 43.0751114575518, 141.377939052952 43.075538392426, 141.37776669926 43.076353883034)) ^^http://www.opengis.net/ont/geosparql#wktLiteral