[HOT] Broken (multi)polygon cleanup

[Donal Hunt]

Re: http://area.jochentopf.com/fixing.html#spikes-buildings
<http://area.jochentopf.com/fixing.html#spikes-buildings>I looked at one of
the issues flagged (e.g. http://maproulette.org/map/2498/2186222) and don't
really understand what the "spike" problem is. Are there examples of how to
identify the issue? Are these issues only fixable in JOSM or can one use ID?

Re: http://maproulette.org/ui/admin/list/379/Challenge/tasks/2499
Error: Forbidden: User [1466] does not have access to this project [379]

Thanks!

d.

On Thu, Apr 27, 2017 at 2:36 PM, Jochen Topf <jochen at remote.org> wrote:

> Hi!
>
> I just posted a new Maproulette challenge for fixing one particular case
> of broken polygons: Building ways with "spikes". Details are at
> http://area.jochentopf.com/fixing.html#spikes-buildings .
>
> Because there is a large number of those in HOT areas, I have split
> those off into their own challenge
> (http://maproulette.org/ui/admin/list/379/Challenge/tasks/2499).
> Would be great to get some help fixing those from the HOT community.
>
> Jochen
>
> On Wed, Mar 15, 2017 at 04:06:05PM +0100, Jochen Topf wrote:
> > Date: Wed, 15 Mar 2017 16:06:05 +0100
> > From: Jochen Topf <jochen at remote.org>
> > To: hot at openstreetmap.org
> > Subject: [HOT] Broken (multi)polygon cleanup
> >
> > Hi!
> >
> > There are many broken (multi)polygon geometries in OSM data leading to
> > all sorts of problems. I have started an effort to get this cleaned up.
> > You can read more about this at http://area.jochentopf.com/ .
> >
> > This effort has been running for about a month now and we can already see
> > some good results. See https://github.com/osmlab/
> fixing-polygons-in-osm/issues/15
> > for some news about what's been happening.
> >
> > I am writing to the HOT list today, because a not-so-small part of the
> > problems come from HOT mappers. For instance, looking at one particular
> > problem here (spikes in closed ways), I am seeing about 5800 errors, of
> > which about 1600 are in areas covered by the HOT tasking manager. (Of
> > couse not all of these have been done in the course of HOT mapping, but
> > probably most of them.)
> >
> > I am reaching out to some of the regional OSM communities and also to
> > HOT, because I want to a) ask for the help of all the communities in OSM
> > to fix those errors and b) generally raise awareness, so those problems
> > can be minimized in the future.
> >
> > Please go to the web sites linked above and read up on what the problems
> > are and how we are fixing them. I also want to offer my help in
> > preparing special data extracts or Maproulette challenges etc. to help
> > the HOT community participate in the cleaning up effort in a way that
> > makes sense to you. I could, for instance, put those 1600 errors
> > mentioned above in a special Maproulette challenge, if that would be a
> > good way for HOT mappers to work on them.
> >
> > Tell me what you think. I appreciate any feedback.
> >
> > Jochen
> > --
> > Jochen Topf  jochen at remote.org  https://www.jochentopf.com/
> +49-351-31778688
> >
> > _______________________________________________
> > HOT mailing list
> > HOT at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/hot
>
> --
> Jochen Topf  jochen at remote.org  https://www.jochentopf.com/
> +49-351-31778688
>
> _______________________________________________
> HOT mailing list
> HOT at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/hot
>
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