Where do you find the steepest slopes of Switzerland? Slope classes over 30° (swisstopo)
Derivate representation of the digital terrain model swissALTI3D and models from France, Italy, Austria and Germany, which allows for the identification of inclinations over 30°. This information is useful for preventing avalanche accidents.
According to the recommendation of the Institute for Snow and Avalanche Research SLF the slopes are categorized into 4 classes. They were calculated from a combined digital terrain with a resolution of 10m made up from swissALTI3D for Switzerland and Liechtenstein, RGE ALTI for France, TINITALY for Italy, DGM10 for Austria, DGM1 for Bavaria and EU-DEM for Baden-Württemberg. The precision of the inclination values in the transistional area between the different base models cannot be guaranteed. Liability claims for the representation of gradients over 30° cannot be asserted.
SilvaProtect-CH (hazard information at national level)
Snow avalanches (FOEN) During avalanche release, snow suddenly detaches in the starting zone. The detached snow mass slides very quickly along a track or rolls down the slope as a mixture of air and snow. It comes to a halt in a deposition area. This layer contains a general hazard index map of the potential avalanche release areas based on the modelling of the avalanche process carried out by the SilvaProtect-CH project. The modelling of the avalanche processes does not take the effect of forests into account and only include avalanches whose starting zones are located in the forest.
Link to the map: map.geo.admin.ch