メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.318035088052 43.0529037065354, 141.317901999726 43.0534905738518, 141.317027648962 43.0532505184668, 141.316393677847 43.0530646013919, 141.316495555424 43.0526203900205, 141.316539867536 43.0523230483525, 141.317259072579 43.0524151371728, 141.318106848514 43.0525349220098, 141.318035088052 43.0529037065354)) ^^http://www.opengis.net/ont/geosparql#wktLiteral