メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.87028442907 35.0978766928011, 136.870461819047 35.0978852239373, 136.870418429188 35.0983897215802, 136.870386092324 35.0987658770965, 136.870172477044 35.0987276115753, 136.869678730176 35.0986162008746, 136.869435703699 35.0985544130386, 136.869222883246 35.0984634768788, 136.869053137363 35.0982813857053, 136.868703650462 35.0979500639998, 136.868552175423 35.0977923105907, 136.87028442907 35.0978766928011)) ^^http://www.opengis.net/ont/geosparql#wktLiteral