[mkgmap-dev] WG: Please help

Wed Feb 1 18:10:43 GMT 2017

Hi Ticker,

did not yet try to understand the details. I used GPXCreator to analyse the shape before the split and the two parts
which are causing the message. I did not understand why they cause a problem, so I wondered if the split algo is wrong
or if there is still a bad intersection in the shape produced by the mp-cutter.

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Mittwoch, 1. Februar 2017 19:05:42
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] WG: Please help

Hi Gerd

Did the other comment help you find the problem - it occurred to me
later that I was dumping the data on input to the crashing
ShapeSplitter and something had probably clipped the shape between
multiPolygon generating it and this division.

Also my plot shows the area rotated by 90 degrees (Latitude as X =
horizontal)

Ticker

On Wed, 2017-02-01 at 16:39 +0000, Gerd Petermann wrote:
> Hi Ticker,
>
> if diagonal cuts cause problems I can stop this.
>
> Gerd
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> Gesendet: Mittwoch, 1. Februar 2017 17:04:36
> An: mkgmap-dev at lists.mkgmap.org.uk
> Betreff: Re: [mkgmap-dev] WG: Please help
>
> Hi Gerd
>
> I've plotted the outer data. Not quite well enough to see all the
> directions of lines and if they emerge into each hole without
> crossing,
> or any slight overlaps, however:
>
> On the bottom edge, there are two areas in the middle that look as if
> they should be indentations into the overall area but also have a
> bottom edge that follows the bounding box
>
> Probably not a problem - on the left edge there are two holes where
> the
> top one is closer to the edge than the hole it is joined from
>
> Are diagonal cuts OK - on some devices you can see where this is
> happening (for some reason the original OSM data did this)
>
> Let me know if you want me to look in more detail.
>
> Ticker
>
> On Wed, 2017-02-01 at 15:24 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> >
> > I tried to reach you with a PM but that was returned, so I try
> > again
> > via list...
> >
> > Gerd
> >
> > ________________________________________
> > Von: Gerd Petermann
> > Gesendet: Mittwoch, 1. Februar 2017 16:09
> > An: Ticker Berkin
> > Betreff: Please help
> >
> > Hi Ticker,
> >
> > I try to understand why ShapeSplitter complains about a polygon
> > created by my new algo.
> > Attached is a patch and an input file.
> > Command:
> > java -Dlog.config=mkgmap_log.props -ea -jar dist\mkgmap.jar
> > f:\osm\test.osm.pbf
> > My mkgmap_log.props contains
> > .level=WARNING
> > and I see this warning:
> > WARN: uk.me.parabola.util.ShapeSplitter  f:\osm\test.osm.pbf:
> > Direction of shape and hole conflict; probably self-intersecting
> > polygon this: fp=146086642 lp=146173971 area=19324813903 #=134
> > http://www.openstreetmap.org/?mlat=48.975820&mlon=13.355620&zoom=17
> > http://www.openstreetmap.org/?mlat=48.988628&mlon=13.389160&zoom=17
> >  o
> > ther: fp=146153055 lp=146161739 area=22313626 #=6
> > http://www.openstreetmap.org/?mlat=49.002597&mlon=13.353453&zoom=17
> > http://www.openstreetmap.org/?mlat=49.003250&mlon=13.352696&zoom=17
> >
> > I don't see what's wrong here.
> >
> > Gerd
> > _______________________________________________
> > mkgmap-dev mailing list
> > mkgmap-dev at lists.mkgmap.org.uk
> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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