メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.913436770494 43.5129688790376, 141.913369929825 43.5127440962935, 141.91322560558 43.5122585624963, 141.913157937183 43.5120310000287, 141.912939846098 43.5113381370857, 141.914873970163 43.511030066809, 141.915197459071 43.5121074933972, 141.915360564448 43.5126674139675, 141.913436770494 43.5129688790376)) ^^http://www.opengis.net/ont/geosparql#wktLiteral