メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.980705175035 43.551771757802, 144.979759786292 43.5512665069924, 144.980473090195 43.5506885631745, 144.98133692894 43.5512078172759, 144.980705175035 43.551771757802)) ^^http://www.opengis.net/ont/geosparql#wktLiteral