メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.262863119747 43.199280290227, 144.260404058672 43.1992124922168, 144.261054532185 43.1977697353685, 144.262906120531 43.1978989851254, 144.262863119747 43.199280290227)) ^^http://www.opengis.net/ont/geosparql#wktLiteral