メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.382691222761 44.1751394510383, 142.382581699739 44.1752160459712, 142.382444793255 44.1753124321301, 142.38238055375 44.1753559283143, 142.38218816721 44.1755298492759, 142.382005743825 44.1757192286, 142.379522161195 44.1753548576368, 142.379659666433 44.1749225543017, 142.37974194559 44.1746518476161, 142.382691222761 44.1751394510383)) ^^http://www.opengis.net/ont/geosparql#wktLiteral