メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.911619605906 43.5115389886347, 141.911583679892 43.5115444381222, 141.911684100436 43.5112857245949, 141.911802911073 43.5108623262848, 141.911883808233 43.5105740879568, 141.911906595395 43.5100476242928, 141.911897720801 43.5098600739329, 141.911823403599 43.5097207141491, 141.912407536065 43.5096075286357, 141.912939846098 43.5113381370857, 141.91205389242 43.5114729371951, 141.911619605906 43.5115389886347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral