メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363861297222 43.0803831596473, 141.362179034181 43.0801352990859, 141.362462998201 43.0790087951908, 141.363293943755 43.0791160856999, 141.364120666718 43.0792236886412, 141.364105900994 43.0792895424993, 141.363982521756 43.079841300742, 141.363861297222 43.0803831596473)) ^^http://www.opengis.net/ont/geosparql#wktLiteral