Hi @Dkat, I wrote you an email.
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RE: Scale on map
Yes, there is a scale in kilometers.
You just need to click on the right button of your mouse (or a long press on screen if your are on the phone app). This opens a pop up window where you can select Distance&planning.
By this way you get the exact distance between 2 points, or more.
RE: Map projections
If you read carefully this topic, you will find a possible answer to your suggestion:
Skier or snowboarder? You’ll love this…
As @idefix37 pointed out, there’s better metric for that and Windy already has the feature. It's the Snow depth forecast map, although it has it's limits - namely the grid of the forecast models (9 km for ECMWF, 7 km for ICON).
If you cumulate the snowfall over several days, it will not give exactly the depth of snow, because the snow compacts gradually: Its density increases.
On Windy the Snow depth layer gives you directly the information as well as the snow density.
But because of the low resolution of the weather models, this information is very rough and quite inaccurate in mountains.