メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.770161618814 43.1464306983921, 140.765613769236 43.1498459031238, 140.763249760718 43.147888016276, 140.76421126649 43.1471282387194, 140.765067212764 43.146482771535, 140.766362078995 43.1454914228587, 140.767714455727 43.1444594503781, 140.768439865818 43.1439109367955, 140.770161618814 43.1464306983921)) ^^http://www.opengis.net/ont/geosparql#wktLiteral