[OSM-talk] Fixing broken multipolygons

Jochen Topf jochen at remote.org
Sat Mar 4 07:49:13 UTC 2017

On Fri, Mar 03, 2017 at 05:27:18PM +0100, Sebastiaan Couwenberg wrote:
> On 03/03/2017 05:10 PM, m at rtijn.org wrote:
> > Since the ‘self-intersecting’ challenge is now complete I featured the ‘Wrong role’ challenge in MapRoulette. Happy fixing!
> Are there plans to make these challenges permanent or periodically
> re-introduce them when a new batch of issues has been prepared?

No plans yet. My current focus is to get rid of all the old cases. Once
that is (mostly) done, we can see how things develop.

> These are very common issues that will be introduced by mappers in the
> future.

Looking at the graphs on http://area.jochentopf.com/stats you can see
that the number of (multi)polygons is growing steadily, while the number
of errors has been more or less flat over the last half year. So either
there are not a significant amount of new problems or old problems are
being fixed as fast as new problems are introduced. Both leads me to
believe that existing QA tools and/or better editors than we had
historically keep this problem in check. But, as I said, we'll first
need to get the number of errors down to low level and see how things
look then.

And maybe when there are less cases we can better see specific problems
creeping up that can be solved by improving editors etc.

Jochen Topf  jochen at remote.org  https://www.jochentopf.com/  +49-351-31778688

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