メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.338845393584 43.0941601962919, 141.338762916782 43.0944800961434, 141.33864431689 43.0949386066842, 141.337863639613 43.0948147904237, 141.337092592256 43.0947018059392, 141.33713505118 43.0944600037402, 141.337181769973 43.0942608556752, 141.337212792073 43.0941364107766, 141.337238283532 43.0940547522911, 141.337273521263 43.0939695841894, 141.338845393584 43.0941601962919)) ^^http://www.opengis.net/ont/geosparql#wktLiteral