メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.918873856175 35.1936928077432, 136.918888893331 35.1939832683764, 136.918415756392 35.1940068658363, 136.918399877226 35.194030214186, 136.917958976988 35.1940400740445, 136.91794468773 35.1937239102288, 136.917918137128 35.1931379959422, 136.918384532766 35.1931222735653, 136.9188304588 35.1931086911832, 136.918873856175 35.1936928077432)) ^^http://www.opengis.net/ont/geosparql#wktLiteral