メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355890759694 43.1182686211414, 141.355889227261 43.1182749390771, 141.355796744926 43.1186584712318, 141.355698822438 43.1190725516237, 141.354205730747 43.1188373104559, 141.35432212999 43.1184207026734, 141.354412370799 43.1180335681664, 141.354486762589 43.117719025075, 141.35597249816 43.1179568066197, 141.355890759694 43.1182686211414)) ^^http://www.opengis.net/ont/geosparql#wktLiteral