メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373290016577 43.7553450741496, 142.372566147976 43.7555305989181, 142.372217303263 43.7549353822258, 142.371867165771 43.7541804487539, 142.371315039596 43.7542391873564, 142.370981426467 43.7536043973449, 142.371939025059 43.7532412475329, 142.372502478985 43.7531054924905, 142.373325512268 43.752953087241, 142.374442586011 43.7550306403043, 142.37390823107 43.7551709107935, 142.373290016577 43.7553450741496)) ^^http://www.opengis.net/ont/geosparql#wktLiteral