メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.99389630678 43.5517850443688, 144.993036219206 43.5512274724049, 144.993121603443 43.5511575297783, 144.99394866055 43.550502791419, 144.994803378806 43.5510571804791, 144.994727456584 43.5511182490488, 144.99389630678 43.5517850443688)) ^^http://www.opengis.net/ont/geosparql#wktLiteral