メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356951397116 43.0542708619163, 141.35679410846 43.0548264348298, 141.356707008413 43.0551713562733, 141.356676583102 43.0552919446836, 141.356644428387 43.0554192721416, 141.355019152889 43.0552057759434, 141.355026749629 43.0551384600762, 141.355159008032 43.0546103326229, 141.355292623026 43.0541075351996, 141.355306563582 43.0540523642963, 141.356661272349 43.0542323059448, 141.356951397116 43.0542708619163)) ^^http://www.opengis.net/ont/geosparql#wktLiteral