Slope angle map and avalanche terrain
Slab avalanches mostly release on slopes of 30° or more. GPXTools colours the slope of the terrain anywhere and tells you which stretches of your route cross or pass below steep ground.
How to do it
- 1 Open GPXTools and turn on the slope layer (Avalanches and winter tool, or the layer menu).
- 2 Draw or open your winter route and press Analyse the route.
- 3 Check the stretches, the day’s bulletin and the snow and weather before you go.
What you get
- Slope classes 25–30°, 30–35°, 35–40°, 40–45° and over 45°
- Stretches on steep slopes or exposed to slopes above
- Official avalanche bulletins: ICGC, Aran, Andorra, France, the Alps…
- New snow, freezing level, wind and daylight
Frequently asked questions
Where does the slope map come from?
It is computed from a terrain model (Mapterhorn), with a resolution of a few metres in many mountain areas, so it works in the Pyrenees, the Alps and everywhere else.
Does it replace the avalanche bulletin?
No. It is a planning aid: always check the official bulletin, carry a transceiver, shovel and probe, and decide on the ground.
Is it free? Do I need to install anything?
Yes, GPXTools is free and has no ads. It works in the browser on a computer, tablet or phone, without installing anything, and it can also be installed as an app.