[mkgmap-dev] special case where splitting fails without a log message

Thu May 27 16:10:37 BST 2021

Hi Ticker,

yes, sure. I've converted a gpx output to OSM. All polygons with holes are not valid OSM ways, but they are very normal as MapShape.
Validator doesn't help much with these polygons.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Donnerstag, 27. Mai 2021 17:06
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] special case where splitting fails without a log message

Hi Gerd

JOSM gives a self-crossing way validation error on this.

Ticker

On Thu, 2021-05-27 at 14:53 +0000, Gerd Petermann wrote:
> Hi Ticker,
>
> no need to hurry ;)
> Here is one:
> https://files.mkgmap.org.uk/download/508/water.osm
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> Gesendet: Donnerstag, 27. Mai 2021 16:47
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] special case where splitting fails without
> a log message
>
> Hi Gerd
>
> next patch also has a problem - sorry to waste your time.
> Can I have your test data.
>
> Ticker
>
> On Thu, 2021-05-27 at 14:33 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> >
> > with my current test environment the patch doesn't improve the
> > result.
> > It reports some errors (the old code didn't always detect them) and
> > eithers add or removes parts of the heavily merged shapes.
> >
> > I've inspected one shape and found no obvious problem. No point is
> > visited more then twice, but 167 points are visited twice. Let me
> > know if you need the data.
> >
> > Gerd
> >
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> > Gesendet: Donnerstag, 27. Mai 2021 16:09
> > An: Development list for mkgmap
> > Betreff: Re: [mkgmap-dev] special case where splitting fails
> > without
> > a log message
> >
> > Thanks Gerd, that works for me
> >
> > Ticker
> >
> > On Thu, 2021-05-27 at 12:54 +0000, Gerd Petermann wrote:
> > > Hi Ticker,
> > >
> > > I first convert the gpx layer to a data layer, then add the tag
> > > natural=water
> > > Next execute validator which will complain that the way is not
> > > closed.
> > > Right click on that warning allows to "zoom to problem" .
> > > This tells you where the first point is.
> > >
> > > In the "OSM data" preferences I've enabled "Draw segment order
> > > numbers on selected way"
> > >
> > > Hope this helps.
> > >
> > > Gerd
> > >
> > > ________________________________________
> > > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im
> > > Auftrag
> > > von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> > > Gesendet: Donnerstag, 27. Mai 2021 14:21
> > > An: Development list for mkgmap
> > > Betreff: Re: [mkgmap-dev] special case where splitting fails
> > > without
> > > a log message
> > >
> > > Hi Gerd
> > >
> > > Trying to use JOSM to decide if a gpx trace represents a self
> > > -intersecting polygon is difficult. Is there a way of forcing it
> > > to
> > > consider it closed and then check itself? Failing that, number
> > > the
> > > points or segments somehow.
> > >
> > > Ticker
> > >
> > >
> > > _______________________________________________
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> > > mkgmap-dev at lists.mkgmap.org.uk
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