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

Thu May 27 11:54:20 BST 2021

Hi Ticker,

sounds good. I'm making progress with a better ShapeMerger that produces less jitter, but so far it still produces some.
Will try it later..

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 12:49
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] special case where splitting fails without a log message

Hi Gerd

I think this can cope with any number of lines, in either/both
directions, following the same path. Also it should give better output
if same number of lines in both directions.

With debug, if it notices a problem, it generates a GPX trace of the
original and traces of all the resultant bits individually in a
subdirectory relevant to the split line.

I've tested it on a few examples, but I'll stress-test GBR again and
check the shapes where it detects problems.

I probably need to tidy up some message levels and comments.

Ticker

On Wed, 2021-05-26 at 11:17 +0100, Ticker Berkin wrote:
> Hi Gerd
>
> I have to design a shape that does this and think what it means. With
> the extra handling needed for identical opposite lines it will be
> easy
> to detect. Maybe possible to just chuck it.
>
> I'm out for the rest of the day so can't do anything until tomorrow.
>
> Ticker
>
> On Wed, 2021-05-26 at 08:46 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> >
> > OK, I think your patch improves some cases. I've also fixed another
> > potential cause for these problems with r4744.
> >
> > I think I have to find a way to avoid those segments which are
> > visited multiple times in the same direction. There's probably
> > always
> > an alternative merge order that avoids this.
> >
> > Gerd
>
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