[Talk-us] MapRoulette new challenge: connectivity

Martijn van Exel m at rtijn.org
Mon Oct 29 21:46:08 GMT 2012


On Mon, Oct 29, 2012 at 3:21 PM, Matthias Meißer <digi_c at arcor.de> wrote:
> I realy like the idea of gamification and looking on other continents is
> very interesting :)
> But (that might be what Frederik already said), remember that the rest of
> the community outside the US is quit unfamilar with TIGER import issues in
> detail.
> For example, I tried to fix a bug, but it turned out, that the road didn't
> match the BING imagery. So what to do? Is BING or TIGER wrong?
> So my idea is, just to create a short gallery with common TIGER problems, to
> help strangers to repair this part of our dataset :)

That is a really good point. TIGER is weird in so many different ways,
even I keep running into things I never thought would make it even
into TIGER.
I wouldn't really know how to classify the problems you see in TIGER,
though. Misalignment is definitely a major one. Misclassification as
well, due to dubious choices at import (most 'residential' should
actually be 'unclassified', for example) and there are lots of roads
that I would tag tertiary that are lowest paved road class (A41,
mapped to residential in OSM). Others?

I would love to collect a few 'worst practices in a blog post on
openstreetmap.us - anyone willing to do a guest post?

In general, I would venture to say unedited TIGER can almost certainly
be improved using Bing imagery anywhere in the US.
martijn van exel

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