メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.626305504754 34.9364968455093, 136.624892488194 34.9363876191262, 136.625016087038 34.9353504143241, 136.626294621734 34.9354561740049, 136.626305504754 34.9364968455093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral