メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357435369629 43.0904598783092, 141.357987990896 43.0905331792002, 141.357899702747 43.0908571251708, 141.357823271609 43.0912301829889, 141.357801065204 43.0913187631726, 141.357580163719 43.0921439581208, 141.357025393672 43.092072326131, 141.356032785595 43.0919389703473, 141.356145822548 43.0914911602922, 141.356334769151 43.0907131888214, 141.356426178846 43.0903203469345, 141.357435369629 43.0904598783092)) ^^http://www.opengis.net/ont/geosparql#wktLiteral