https://www.bfs.admin.ch/bfs/de/home/grundlagen/agvch.assetdetail.1666963.html Swiss Federal Statistical Office - Amtliches Gemeindeverzeichnis der Schweiz - Mutationsmeldungen 2016] accessed 16 February 2017 It consists of the haufendorf (an irregular, unplanned and quite closely packed village, built around a central square) of Flerden on the inner Heinzenberg at an elevation of 1234 meters .