メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.230730512104 35.0677157655934, 135.230759540413 35.0683871177628, 135.229280654742 35.0684237783829, 135.229293445442 35.0681758609691, 135.229264104507 35.0678740982534, 135.229162076672 35.0674580111851, 135.229052594593 35.0672530406256, 135.229701023716 35.0674112029046, 135.230730512104 35.0677157655934)) ^^http://www.opengis.net/ont/geosparql#wktLiteral