メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.380927580913 43.0897926774477, 141.381634563014 43.0896672286721, 141.381826211974 43.0902353816689, 141.382151579175 43.0911736275944, 141.381468704227 43.0913032707785, 141.380118287019 43.091549933894, 141.380053122734 43.091279732415, 141.380008330776 43.0910752306099, 141.379800361248 43.0901027754255, 141.379774924206 43.0900423815884, 141.380322627011 43.0899095426628, 141.380565466422 43.0898646171714, 141.38081679061 43.0898167327032, 141.380927580913 43.0897926774477)) ^^http://www.opengis.net/ont/geosparql#wktLiteral