メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32267986002 43.1055687419627, 141.323024178215 43.1058787264875, 141.323014868996 43.1058786509597, 141.323670063784 43.1065464493249, 141.32329682867 43.1067527875, 141.323131558157 43.1068406928151, 141.322935201161 43.1069467005697, 141.322573129429 43.1071381477615, 141.322215517585 43.1073391234391, 141.321571560938 43.1066775969677, 141.320854960205 43.1059780675787, 141.320900443146 43.1059536104285, 141.321260717386 43.1057601802774, 141.321599620727 43.1055835994636, 141.322315494301 43.105188195897, 141.32267986002 43.1055687419627)) ^^http://www.opengis.net/ont/geosparql#wktLiteral