メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.750626447197 42.9049854565943, 140.74954572764 42.9050364128559, 140.748602357164 42.9050651784486, 140.748523883914 42.9044903862297, 140.748410943017 42.9044450170473, 140.748369195272 42.9041823444797, 140.748481152179 42.9041775547464, 140.749468106741 42.9041222844758, 140.749467408041 42.9040998395404, 140.750556543854 42.9040601771115, 140.750626447197 42.9049854565943)) ^^http://www.opengis.net/ont/geosparql#wktLiteral