メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.389024956089 42.9831591695521, 144.388944306199 42.9834132203337, 144.387401602127 42.983143121842, 144.387641388585 42.9823953577798, 144.387792496381 42.9824384553929, 144.388124567272 42.9825733897011, 144.388302219312 42.9826692264751, 144.388458701544 42.9827677796019, 144.389024956089 42.9831591695521)) ^^http://www.opengis.net/ont/geosparql#wktLiteral