メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.314405966831 43.0918114274819, 141.314035404063 43.0920290876765, 141.313684167215 43.0922379019214, 141.313301375345 43.0924643203828, 141.312374352766 43.0916226263618, 141.312757356434 43.0913884772401, 141.313117305395 43.091180932661, 141.313473894224 43.0909606998357, 141.313734966766 43.0911898577245, 141.313951141935 43.0913931897164, 141.314268645786 43.0916852600047, 141.314405966831 43.0918114274819)) ^^http://www.opengis.net/ont/geosparql#wktLiteral