メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.002755352248 43.5701520058401, 145.0026862457 43.5701041668301, 145.00189904189 43.5695831919661, 145.003490702458 43.5683358854693, 145.003567668791 43.5683864516556, 145.004099473937 43.5687360530369, 145.004309975548 43.5688729866356, 145.003343719778 43.5696593075022, 145.002755352248 43.5701520058401)) ^^http://www.opengis.net/ont/geosparql#wktLiteral