メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.321356780175 43.0577784265883, 141.321275403181 43.0581052181141, 141.321201766334 43.0584212421183, 141.321046895905 43.0590606117779, 141.319688401398 43.0588772684035, 141.319746565337 43.0586399584294, 141.319816815578 43.0583645587767, 141.319926268145 43.0578307360796, 141.319987536171 43.0576226387335, 141.320087073145 43.057205271268, 141.321015685336 43.0573211818462, 141.321451485622 43.0573755772976, 141.321367211991 43.0576910214687, 141.321356780175 43.0577784265883)) ^^http://www.opengis.net/ont/geosparql#wktLiteral