メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.751878536742 35.4034996181161, 136.751538185216 35.4035702814953, 136.75123728492 35.4025645473102, 136.751567493614 35.4024922984305, 136.751788181141 35.4032398779046, 136.751878536742 35.4034996181161)) ^^http://www.opengis.net/ont/geosparql#wktLiteral