メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.035094671416 42.9109051098564, 143.034708791638 42.91087525621, 143.034699646559 42.910968930545, 143.033843268536 42.9109175351294, 143.033993903192 42.9097434272127, 143.035235852706 42.9098286153694, 143.035094671416 42.9109051098564)) ^^http://www.opengis.net/ont/geosparql#wktLiteral