メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32937491709 43.1235904901032, 141.330226283386 43.1244276214202, 141.329828025246 43.1246512188567, 141.329502532266 43.124837144154, 141.329260519426 43.1249752852439, 141.329163286337 43.1250308333394, 141.328785852571 43.1252354658902, 141.327925697848 43.1243830618088, 141.327244781844 43.1237121351834, 141.327963508135 43.1233049077269, 141.32868024922 43.1229013169322, 141.32937491709 43.1235904901032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral