メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.362093393093 43.0873723533389, 141.362009395159 43.0876932413782, 141.361903195769 43.0881028526771, 141.360234938355 43.0878816535784, 141.360416805138 43.0871511628599, 141.36049243294 43.0867660709472, 141.360583687981 43.0864148587672, 141.361396248289 43.0865258886813, 141.362273644756 43.0866458551637, 141.362194889245 43.0870025112247, 141.362153019965 43.0871507194513, 141.362093393093 43.0873723533389)) ^^http://www.opengis.net/ont/geosparql#wktLiteral