メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.862208476197 43.3457841436533, 141.860421495419 43.3460636688824, 141.859991415089 43.3445676309181, 141.861772788941 43.3443193876583, 141.862208476197 43.3457841436533)) ^^http://www.opengis.net/ont/geosparql#wktLiteral