メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.316935954736 43.0512726772435, 141.315748474402 43.051099121114, 141.316949589881 43.0501967507525, 141.317392120078 43.0504334288318, 141.31724023177 43.0506031614177, 141.317137223766 43.0507557803878, 141.317043471889 43.050980914046, 141.316980563565 43.0511136040424, 141.316935954736 43.0512726772435)) ^^http://www.opengis.net/ont/geosparql#wktLiteral