メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.915833717911 35.0959842615824, 136.915977245884 35.0960046294344, 136.917253504771 35.0962262182012, 136.917005941265 35.0970470264862, 136.914511170007 35.0965427500444, 136.913087967117 35.0962703298138, 136.913288813088 35.0955330985732, 136.913534443703 35.0955712196543, 136.914716110638 35.0957786225721, 136.915833717911 35.0959842615824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral