メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.362586926137 43.1042043357999, 141.362520531697 43.1044944075315, 141.362444049097 43.1048116167627, 141.361942195012 43.1047429582962, 141.361507898419 43.1046819255218, 141.36097298891 43.1046028102889, 141.361130844057 43.1040027503484, 141.361253963216 43.1035211304715, 141.361266512248 43.1035227751821, 141.362709839589 43.1037161030006, 141.362586926137 43.1042043357999)) ^^http://www.opengis.net/ont/geosparql#wktLiteral