メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.713246461084 43.1722711158568, 141.713298234492 43.1723283255122, 141.71346777642 43.1725331495948, 141.713544059158 43.1726280317996, 141.713591303364 43.1726867684796, 141.713833618239 43.1730311182027, 141.713904805005 43.1731929310088, 141.713996311321 43.1733549110431, 141.714070935616 43.1734530187745, 141.714133944637 43.1735552950124, 141.714212079618 43.1737522330278, 141.714491648878 43.1744920863845, 141.714596836516 43.1747497076239, 141.714617996882 43.1748245664365, 141.714505849304 43.1751059982312, 141.713967298771 43.1748509164832, 141.712634539665 43.1741554209835, 141.71228464072 43.173982239702, 141.711835190019 43.173759849471, 141.711335178791 43.1735123936855, 141.712407188188 43.1723989717444, 141.712942237534 43.1718867353112, 141.712969269501 43.171932578717, 141.71310413242 43.1721138209243, 141.713246461084 43.1722711158568)) ^^http://www.opengis.net/ont/geosparql#wktLiteral