メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.981693663345 35.7636891777967, 136.981562885886 35.7637505945448, 136.981072114234 35.7632974772929, 136.980974189189 35.7632104143249, 136.981498328649 35.7629572313925, 136.98164813828 35.7628848759352, 136.981890918435 35.7632852929855, 136.982052479059 35.7635206846652, 136.981693663345 35.7636891777967)) ^^http://www.opengis.net/ont/geosparql#wktLiteral