メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.97042489231 43.5476430272591, 144.970862412719 43.5479340279542, 144.970042395699 43.5485997118183, 144.96958232379 43.5482973620545, 144.969231750682 43.5480564274381, 144.970041278902 43.5474154352575, 144.97042489231 43.5476430272591)) ^^http://www.opengis.net/ont/geosparql#wktLiteral