メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.055314299631 42.9047025186897, 143.054722218411 42.9046603990814, 143.054606443628 42.9046521391771, 143.054126402064 42.904618020819, 143.053547252099 42.904577070125, 143.053000182681 42.9045384241335, 143.053130682457 42.9035888577488, 143.053135578684 42.9035534458078, 143.055214188474 42.9037151845732, 143.055420061363 42.9039936635652, 143.055314299631 42.9047025186897)) ^^http://www.opengis.net/ont/geosparql#wktLiteral