メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.273800188263 44.0226495438388, 144.273174762102 44.0227009337507, 144.272318090564 44.0227781234717, 144.272445002744 44.0218969846859, 144.272555405135 44.0213556044701, 144.274145925097 44.0215103090946, 144.274029288263 44.022217350797, 144.274005540001 44.0222182545336, 144.273829724267 44.0222290968339, 144.27366248508 44.0222399388489, 144.273800188263 44.0226495438388)) ^^http://www.opengis.net/ont/geosparql#wktLiteral