メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.769446096511 43.1944018231521, 141.769743947168 43.1945657424368, 141.769073894151 43.195262833046, 141.768781068857 43.1951075832158, 141.768127314515 43.1947854726126, 141.768812152997 43.194060529317, 141.769446096511 43.1944018231521)) ^^http://www.opengis.net/ont/geosparql#wktLiteral