メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.76232820401 35.4169600525744, 136.762021150244 35.4169841739992, 136.761945553441 35.4164116195642, 136.762267965676 35.41642078764, 136.76232820401 35.4169600525744)) ^^http://www.opengis.net/ont/geosparql#wktLiteral