メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.329451942088 43.0639080834602, 141.329649247889 43.0639354064391, 141.330227380188 43.0640154593305, 141.330167511554 43.0642411509236, 141.330058939519 43.0646504424949, 141.329982699409 43.0649377559238, 141.329919672812 43.0651753839169, 141.329135967616 43.0650618904271, 141.328392402606 43.0649584222647, 141.328502575336 43.064538742693, 141.32868464055 43.0638085053172, 141.329451942088 43.0639080834602)) ^^http://www.opengis.net/ont/geosparql#wktLiteral