メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.38148890771 43.0656827000219, 141.381142024141 43.066269500419, 141.379589957546 43.0659398200038, 141.380057792161 43.0652661018815, 141.38148890771 43.0656827000219)) ^^http://www.opengis.net/ont/geosparql#wktLiteral