メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.619004375937 34.9206365637692, 136.616611996347 34.9207698891403, 136.616424043042 34.9204843276801, 136.618652666351 34.9202261875114, 136.618982529269 34.9201272490947, 136.618916873084 34.9204573387479, 136.618917420365 34.9205298095476, 136.619004375937 34.9206365637692)) ^^http://www.opengis.net/ont/geosparql#wktLiteral