メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.411306541145 43.7607606442835, 142.412051316677 43.7607212768352, 142.412144325735 43.7617031406927, 142.411386381349 43.761743563886, 142.410102254948 43.7618144592515, 142.40912547688 43.76185070477, 142.409048022505 43.761853572031, 142.408076938938 43.761914398059, 142.40802658902 43.7614499551896, 142.407979560207 43.7609280727956, 142.408684846459 43.7608883225292, 142.410004845922 43.7608200474389, 142.410263677322 43.7608164015204, 142.411306541145 43.7607606442835)) ^^http://www.opengis.net/ont/geosparql#wktLiteral