メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.966376224405 43.5452601482534, 144.965946564297 43.54498821128, 144.966474876881 43.5445645337885, 144.966702360118 43.5447776728918, 144.966840724637 43.5448922015791, 144.966376224405 43.5452601482534)) ^^http://www.opengis.net/ont/geosparql#wktLiteral