メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.379097699433 43.754068683466, 142.378488940189 43.7542302956121, 142.377612823631 43.7544829859671, 142.377041273475 43.7534190030843, 142.378167708735 43.7530958922198, 142.378561641107 43.7529916585095, 142.37918753249 43.7540406646497, 142.379097699433 43.754068683466)) ^^http://www.opengis.net/ont/geosparql#wktLiteral