メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.631778232944 35.3583271725056, 136.631775181881 35.3583465248612, 136.630306814013 35.3582910708327, 136.630328681766 35.3577590558292, 136.630415214711 35.3577570458067, 136.631818297477 35.3578434763755, 136.631817051011 35.3578566395382, 136.631778232944 35.3583271725056)) ^^http://www.opengis.net/ont/geosparql#wktLiteral