メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.329595135439 43.072547699755, 141.328422698668 43.0730497561452, 141.32785941604 43.0723815857312, 141.328664601302 43.072053523907, 141.329644988799 43.0716074477533, 141.329595135439 43.072547699755)) ^^http://www.opengis.net/ont/geosparql#wktLiteral