12. What type of maps on avalanches exist?

Avalanches are not easily predictable and often enough can produce destructive results. Avalanche cartography deals with the causes and consequences of such incidents and tries to depict them in a variety of ways.

Avalanche hazard maps incorporate mainly large-scale topographic elements with thematic features. In such maps, both direct and indirect aspects of avalanches are considered according to aerial photo interpretation and field surveys.

Avalanches become a “risk” when people or physical assets are situated within the reach of the “dangeros process”. Avalanche risk maps show the vulnerability of all values in avalanche hazard areas.

Figure 17 - Map of Snow Avalanche Probable Locations, from the original French "Carte de Localisation des Phénomènes d'Avalanche (CLPA)". The map shows areas identifying possible location of snow avalanche paths: in orange, avalanche paths are identified after the study of aerial photographs (photo-interpretation and field analysis); in purple, avalanche paths are identified after an investigation undertaken by collecting testimonies; orange and purple diagonal lines represent, respectively, area assessed as potential avalanche source areas by aerial photo and field interpretation and by inquiries. Source: www.avalanches.fr