メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.400362203625 43.0311508100955, 141.39929285846 43.0307928375086, 141.398624178892 43.0305436812731, 141.397751418922 43.0302313225765, 141.398171005014 43.0295878240645, 141.398686010413 43.0287955099052, 141.398955634674 43.0283890330081, 141.399567330653 43.0285978163863, 141.399655784873 43.0284470512651, 141.401693732863 43.0291507690154, 141.401605720391 43.029262787579, 141.401207443559 43.0298861314201, 141.400797314282 43.0305132541845, 141.400362203625 43.0311508100955)) ^^http://www.opengis.net/ont/geosparql#wktLiteral