[OSM-talk] Detrimental to the OSM database

Lester Caine lester at lsces.co.uk
Sun Aug 24 09:54:53 UTC 2014


On 24/08/14 05:48, James Mast wrote:
> So, as you can see, there are still a few flaws in the MapRoulette
> smoothing challenge.  And unfortunately, not everybody seems to
> acknowledge that there might be a false positive here and there and mark
> it as such.  Maybe a stronger warning could be given, but I don't know. 
> All I do know is that any time there is a 'Center Turn Lane' on a
> highway here in the USA, it stays as a single way and only becomes
> divided is when there is a physical item dividing the highway like a
> concrete divider.
> 
> Maybe this particular flag could have been avoided where it wouldn't
> flag one-way roads merging into a single way if the angle wasn't like a
> ~90 degree turn or larger as everything is the same right now as when it
> was unfortunately falsely 'smoothed'.

I think this is perhaps my own concern. Rules that work well for some
data may be totally inappropriate for other, so 'challenges' should be
restricted to the areas where those rules are known to work well, rather
than simply blindly applying them world wide?

-- 
Lester Caine - G8HFL
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