メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.487699570425 43.0214206839585, 141.487655987149 43.0215074634369, 141.487393396911 43.0220305930167, 141.487264443426 43.0224242194607, 141.487233138122 43.0226727712691, 141.487080042599 43.0226624668, 141.486473452889 43.022618118513, 141.486660998175 43.0213908290244, 141.487469746941 43.018385068712, 141.487556291332 43.0181724011474, 141.487650103468 43.0181470744526, 141.488647380952 43.0178570604731, 141.488719639424 43.0180906904613, 141.488932368422 43.0185255580601, 141.488881651143 43.0187402232213, 141.487700850263 43.0214180908053, 141.487699570425 43.0214206839585)) ^^http://www.opengis.net/ont/geosparql#wktLiteral