メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.400701876431 44.1720752963251, 142.399688638658 44.1719095490836, 142.399944764712 44.171019025583, 142.399962991341 44.171021779341, 142.400987437712 44.171191974058, 142.40097432217 44.171239647239, 142.400958994081 44.1712866752907, 142.400701876431 44.1720752963251)) ^^http://www.opengis.net/ont/geosparql#wktLiteral