メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.380358498423 44.1701430723019, 142.378112927314 44.1698383637695, 142.378200937472 44.1693510047246, 142.378286608212 44.1688107533028, 142.378352726035 44.168493321243, 142.378991785681 44.1685747364477, 142.380751324036 44.1688785581493, 142.380431626833 44.1699028403252, 142.380358498423 44.1701430723019)) ^^http://www.opengis.net/ont/geosparql#wktLiteral