メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.312577151885 43.0863793855558, 141.311832424216 43.0868214842674, 141.311478940536 43.0864938764344, 141.311096531246 43.0861317095758, 141.311416134702 43.0859442342243, 141.3120555414 43.0855685088077, 141.312378860197 43.0853778101966, 141.312943794469 43.0850445960721, 141.313238953772 43.0853082153419, 141.313470596582 43.0855151208468, 141.313639290348 43.0856719998744, 141.313695978194 43.0857237336353, 141.312577151885 43.0863793855558)) ^^http://www.opengis.net/ont/geosparql#wktLiteral