メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.870242631627 43.011442699302, 142.870206342287 43.0114742625726, 142.869256574514 43.0123002762722, 142.867865704107 43.0114521532776, 142.867870544458 43.0114474857045, 142.868058499647 43.0112680481101, 142.868373148607 43.0109742041724, 142.868499094892 43.0108566386894, 142.868817953304 43.0105814080778, 142.868929903225 43.0106497964852, 142.870242631627 43.011442699302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral