Editing Swisstopo (section)

====Numbering system====
The numbering system of Swiss regular maps (apart from composites) is directly based on the geographical situation. A map number is always one higher than the map number of the adjacent map to the west, and one lower than the adjacent map to the east. From north to south, the numbers differ by 20 for the scale 1:25.000, 10 for the scale 1:50.000 and 5 for the scale 1:100.000. However, as can be seen on the ''Seite nicht gefunden'',<ref>{{cite web |url=http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/maps/national/25.html?mapnr=#mapviewjump |url-status=dead |archive-url=https://web.archive.org/web/20101123170711/http://www.swisstopo.admin.ch/internet/swisstopo/en/home/products/maps/national/25.html?mapnr= |archive-date=23 November 2010 |title=swisstopo: National Map 1:25 000}}</ref> there are some exceptions to this rule: Switzerland is a little bit too large to be only 20 1:25.000 maps wide. Instead of choosing another system, the map to the east of ''1199 Scuol'' is called ''1199bis Piz Lad''. The same is true for some maps at scale 1:50.000.