メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.325918069663 43.0425584662111, 141.325412861999 43.0430879065046, 141.325040809398 43.0436124433362, 141.324028953767 43.0431126550145, 141.323656582329 43.0429372634531, 141.324157120288 43.0424260083596, 141.324086775129 43.042385421705, 141.324590134018 43.0418454226422, 141.325918069663 43.0425584662111)) ^^http://www.opengis.net/ont/geosparql#wktLiteral