メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.326410917549 43.0542795449454, 141.326391496464 43.0543657528909, 141.326338880173 43.0545996646007, 141.325875604458 43.054495000298, 141.324981028636 43.0542961214919, 141.325034617764 43.0540935143107, 141.32505478748 43.0539703904074, 141.325170873833 43.0535402813778, 141.326531874583 43.0537223886018, 141.326410917549 43.0542795449454)) ^^http://www.opengis.net/ont/geosparql#wktLiteral