メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.46101705693 43.4673855402384, 142.46130572879 43.4677226120182, 142.461362908606 43.4677893874626, 142.462245096006 43.4687793295041, 142.460726699745 43.4694665063714, 142.459297063945 43.4700715709943, 142.458752193834 43.4693634922394, 142.458887895879 43.4683897165284, 142.458977184005 43.4679554992761, 142.459259732689 43.4675994852183, 142.459640357141 43.4673701959995, 142.459748402516 43.467342185205, 142.460263113916 43.4671744652609, 142.460640648503 43.4669739425573, 142.46101705693 43.4673855402384)) ^^http://www.opengis.net/ont/geosparql#wktLiteral