メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.91585171182 43.521263358585, 141.914325401139 43.5215011729695, 141.913811943895 43.5198192011451, 141.913804002336 43.5197919963257, 141.915361491132 43.5195360332396, 141.91585171182 43.521263358585)) ^^http://www.opengis.net/ont/geosparql#wktLiteral