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I'm going to change my mind. I don't think mtb:scale:imba should
be deprecated. It should be used instead of mtb:scale because it
is better. The IMBA Trail Difficulty Rating System was designed
for all trails, not just bike park trails or trails with features.
It follows that OSM should use it for all trails too, not just IMBA
signed trails, or bike park trails. I agree with everything
that user Opadeira is proposing and I'll add some comments to the
wiki talk page.<br>
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<div class="moz-cite-prefix">On 4/22/20 7:12 PM, Andrew Harvey
wrote:<br>
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<div dir="ltr">On Thu, 23 Apr 2020 at 03:03, brad <<a
href="mailto:bradhaack@fastmail.com" moz-do-not-send="true">bradhaack@fastmail.com</a>>
wrote:<br>
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<div> I've never seen an official IMBA rating on a sign.<br>
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<div>I have, <a
href="https://wiki.openstreetmap.org/w/images/9/96/Serrata_Mountain_Bike_Track_Board_Map.jpeg"
moz-do-not-send="true">https://wiki.openstreetmap.org/w/images/9/96/Serrata_Mountain_Bike_Track_Board_Map.jpeg</a></div>
<div> </div>
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<div> I see both mtb:scale and mtb:scale:imba both used.
The wiki for mtb:scale doesn't make sense. It's either
skewed for extremely extreme riding or they don't
understand gradient. It says that for mtb:scale=1,
gradient<40%. This is meaningless. Nobody can ride
up an unpaved grade that is 40%, or probably even 30%. A
steep trail is 15%. A really steep, almost unrideable,
very difficult hiking, trail is 20%. Going downhill,
anything above 25% is a double black, only a small
percentage of riders can ride, unless it is very smooth
with really good traction. <br>
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<div><br>
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<div>I agree, I find it very hard to set mtb:scale
confidently based on the descriptions on the wiki. </div>
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<div> In my opinion, mtb:scale:imba could be deprecated, and
the wiki for mtb:scale updated & clarified. <br>
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<div>I would disagree on that, mtb:scale:imba is still useful
to mark officially signposted or designated ratings of the
track made according to the IMBA system, like in the first
photo I posted.</div>
<div><br>
</div>
<div>I'd be very keen to review any improvements to mtb:scale
though, I have very low confidence in all the ones I've
tagged so far as I feel like every time I read the wiki I
have a different opinion </div>
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