メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355772945373 43.1126725116445, 141.355160109821 43.1125896896931, 141.354701506769 43.1125215662802, 141.354170605086 43.1124482372925, 141.354488066188 43.1111868428585, 141.356096377974 43.111420793116, 141.355831520098 43.1124411081303, 141.355772945373 43.1126725116445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral