メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.768338648209 43.2100984117019, 141.767854608311 43.2103648168508, 141.767684506596 43.2104766254587, 141.767382253289 43.2105875950978, 141.767116872985 43.2101552937626, 141.766986610183 43.2099270926515, 141.766987343697 43.2098339817216, 141.767073082375 43.2097274445927, 141.767239119124 43.2096004981782, 141.767657063758 43.2093694750259, 141.768123533145 43.2098698531167, 141.768338648209 43.2100984117019)) ^^http://www.opengis.net/ont/geosparql#wktLiteral