メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.753599545785 42.9055692433829, 140.755328425713 42.9055239074519, 140.755415812117 42.9063702190712, 140.755415457231 42.90638491354, 140.753091190744 42.9064883622341, 140.753027161193 42.9057062147876, 140.753017285265 42.9055844830196, 140.752958197129 42.9048630960283, 140.753529344885 42.9048441949783, 140.753599545785 42.9055692433829)) ^^http://www.opengis.net/ont/geosparql#wktLiteral