Terms of use: the map and the geoservice that provides it may be used in accordance with swisstopo's Terms of Use for Free Geodata and Geoservices (OGD) and the General Terms of Use and Operating Conditions of the Federal Spatial Data Infrastructure FSDI.
https://www.swisstopo.admin.ch/en/home/meta/conditions/geodata/ogd.html
http://www.geo.admin.ch/terms-of-use