メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.371330351594 43.7684116590668, 142.371642428994 43.768962580966, 142.370072043642 43.7694247648817, 142.369768761608 43.7688731621705, 142.369468466341 43.768327007077, 142.371027349667 43.7678767617368, 142.371330351594 43.7684116590668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral