メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.438066335764 43.8096591081553, 142.438223098772 43.8097520061957, 142.438987146444 43.8102227842954, 142.438411006415 43.8107134081807, 142.43746169643 43.8101587571004, 142.436700941891 43.8096698555159, 142.436100989908 43.8093096364436, 142.436702714017 43.8088124251789, 142.438066335764 43.8096591081553)) ^^http://www.opengis.net/ont/geosparql#wktLiteral