[mkgmap-dev] Problem with r3706

Thu Dec 8 11:10:37 GMT 2016

I guess we are hitting an edge case here, it seems that mkgmap overwrites data in the img file.

@Steve: Both RGNDisplay and GPSMapEdit "say" that the img file is corrupted, but I did not find yet

out where this happens.

Like Ticker I think the patch simply avoids the situation, it doesn't fix the problem.

If you are able to reproduce the problem with my test data, please help.

Gerd

________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Gerd Petermann <GPetermann_muenchen at hotmail.com>
Gesendet: Mittwoch, 7. Dezember 2016 16:28:25
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] Problem with r3706

Hi Ticker,

thanks, I'll have a look later.  Maybe it is related to one of my recent changes where

I changed some of those constraints.

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, 7. Dezember 2016 16:08:22
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] Problem with r3706

Hi Gerd

I've been tearing my hair out over this one.

With the test data supplied, the SubDivision structure in the main
output .img file is incorrect. Just changing how areas are split (ie
relaxing the constraint that bounds are exactly representable at the
zoom/shift level) stops the crash, so this is what I've done in the
attached patch.

Sometime soon I'll try and work out when/where it goes wrong but I've
been looking in so many places, thinking I'd tracked down the problem,
only to find no difference, that I want to give up for a while.

Best wishes
Ticker

On Fri, 2016-12-02 at 15:49 +0100, Arndt Röhrig wrote:
> Hi,
> Thank you all for the support!
>
> Best regaards
>
> Ticker Berkin <rwb-mkgmap at jagit.co.uk> hat am 2. Dezember 2016 um
> 15:22 geschrieben:
>
>
> I'll have a look. I didn't intentionally change extended type
> behaviour, but shapes will end up in different subdivisions with the
> option applied
>
> Ticker
>
>
> On Fri, 2016-12-02 at 07:09 -0700, Gerd Petermann wrote:
> I've got some more test data from Arndt, I've reproduced the
> assertion, here
> is the test data:
> http://files.mkgmap.org.uk/download/316/test.zip
>
> The problem seems to be caused by the new
> --order-by-decreasing-area option, if I remove that from the options
> file
> the problem is gone.
>
> @Ticker: Do you have time to analyse it? I assume the problem is that
> we set
> a flag like "extended type points exist" and later remove the
> corresponding
> data. Does that ring a bell?
>
> Gerd
>
> Arndt Röhrig wrote
> <!DOCTYPE html>
>
>
> Hello everybody, i use mkgmap r3706. It run 2 times. The first one
> makes
> the img-files. The second one makes the mdr/mdrx files. The first
> step
> works fine, without error-messages, but the second step produces an
> error
> message and crashes: "Exception in thread "main"
> java.lang.AssertionError: Invalid label offset found 1315595
>         at
> uk.me.parabola.imgfmt.app.lbl.LBLFileReader.fetchLabel(LBLFileReade
> r.
> java:87)         at
> uk.me.parabola.imgfmt.app.trergn.RGNFileReader.fetchPointsCommon(RG
> NF
> ileReader.java:123)         at
> uk.me.parabola.imgfmt.app.trergn.RGNFileReader.pointsForSubdiv(RGNF
> il
> eReader.java:84)         at
> uk.me.parabola.imgfmt.app.map.MapReader.pointsForLevel(MapReader.ja
> va
> :119)         at
> uk.me.parabola.mkgmap.combiners.MdrBuilder.addPoints(MdrBuilder.jav
> a: 273)
>         at
> uk.me.parabola.mkgmap.combiners.MdrBuilder.onMapEnd(MdrBuilder.java
> :1 78)
>         at
> uk.me.parabola.mkgmap.main.Main.endOptions(Main.java:600)
>         at
> uk.me.parabola.mkgmap.CommandArgsReader.readArgs(CommandArgsReader.
> ja
> va:128)         at
> uk.me.parabola.mkgmap.main.Main.mainStart(Main.java:135)
>         at
> uk.me.parabola.mkgmap.main.Main.main(Main.java:106)"
>   
>               
>          When i use mkgmap 3702 an
> error
> message at the first step appears, the second step works fine:
> "SCHWERWIEGEND (ShapeMergeFilter):
> ..\Splitter\88000004.osm.pbf:
> ignoring shape w ith id 364926659 and type 0x13 at resolution 24,
> it has 4
> points and has an empt y area" The OSM-Data is
> "nordrhein-westfalen.osm.pbf". An other map
> "Kanaran"
> works fine, without error. Whats the reason for this and what can i
> do?
> Best regards Arndt
>
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