TomTom has created the same challenge for the Netherlands: https://maproulette.org/browse/challenges/37471
Just days before that challenge was created, I had a discussion on Discord with some other Dutch mappers. I thought it would be easy to tag all remaining highway=motorway without a surface tag in NL with surface=asphalt, since 81% already had this tag and there were no other surface tags present (except a handful on highway=motorway_link). I was quickly proven wrong as one mapper then found a bridge with a concrete surface and tagged it accordingly. It may be the only highway=motorway section in NL, but it demonstrates that my assumption that everything was asphalt was wrong and there is some merit in tagging the surface explicitly. I don't see what's wrong with these MR challenges by TomTom. Of course you can totally ignore them if all you care about is paved / unpaved, but if you want to know more specifics, then explicitly tagged surfaces on motorways still have some value. Op vr 3 feb. 2023 om 13:17 schreef Walker Kosmidou-Bradley < walker.t.brad...@gmail.com>: > Thanks Andy, > > We do use country default values and other customizations. I didn’t really > want to unpack the entire methodology. The point is the more attribution we > have, the easier and faster it is to conduct replicable analysis around the > world. It helps from a coding perspective, even if the attribution might > not make that much sense for any single country. > > It just seems strange that people would complain about others adding > specificity of attributes. If the data is not wrong, and as it not > impacting you who cares? If you don’t want to do those tasks in > MapRoulette, don’t. We all contribute to and interact with OSM data in > different ways. If someone wants to go mark every species of tree, awesome. > If others mark the smoothness of roads, awesome. That’s how the community > works. Something might not make sense to me, but I’m sure it makes sense to > the person making the task. > > Best, > > Walker KB > > > On Feb 3, 2023, at 11:27, Andy Townsend <ajt1...@gmail.com> wrote: > > > > On 2/3/23 09:16, Walker Kosmidou-Bradley wrote: > > > >> I use routing to measure accessibility to schools and health clinics > here in west Africa. I have to make sure that my models also work in South > Asia. Having the surface tag attributed makes processing infinitely easier > because I don’t have to adjust my default values based on country. > > > > (veering off from TomTom's MapRoulette challenge somewhat, but) > > > > Unfortunately, you will have to adjust your default values based on > country. There are enough differences even between mapping approaches in > nearby western European countries that a router will produce nonsensical > results if it makes assumptions valid only in place A in place B as well. > > > > Also, even if someone filled in all the values for an "obvious" tag > (perhaps in response to a MapRoulette challenge such as this one), there's > no guarantee that new motorways would have the same tag added in the > future, or that the tag would remain as more detail is added. > > > > That said - sometimes values that are "obvious" in one place aren't > "obvious" in another, so it's definitely worth having the discussion about > that if it's relevant (which as numerous people have said previously, it > isn't for this challenge in the US. > > > > Best Regards, > > > > Andy > > > > > > > > _______________________________________________ > > Tagging mailing list > > Tagging@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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