メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.599514477323 43.3015729744924, 144.598119814391 43.3019220969841, 144.597632278054 43.3008489909719, 144.599007552869 43.3005170089731, 144.599079672268 43.30049956374, 144.599514477323 43.3015729744924)) ^^http://www.opengis.net/ont/geosparql#wktLiteral