メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.787227467527 45.1033269931819, 141.787743447879 45.0993685775427, 141.787754186529 45.0992861548819, 141.787777991838 45.0991032491374, 141.787802536626 45.098914794037, 141.788291049526 45.0951661844833, 141.788388996148 45.0944148186236, 141.788717528666 45.0918938337821, 141.825702772831 45.0748356873821, 141.826316072271 45.0745525976326, 141.830050632834 45.0791223653713, 141.83320942273 45.0829868541269, 141.832660940396 45.083229719447, 141.787227467527 45.1033269931819)) ^^http://www.opengis.net/ont/geosparql#wktLiteral