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[mkgmap-dev] Bad routing on eTrex and MapSource

From Gerd Petermann gpetermann_muenchen at hotmail.com on Thu Jul 9 14:00:05 BST 2020

Hi Ticker,

I used the style from r4295 and your options and an unpatched r4561, but my *.img file is a bit different and I see no problems in Basecamp 4.7.1, but I can reproduce the long detour in MapSource.
Maybe a difference in the bounds file, but more likely you use a patched version of the style or the binary.


Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Donnerstag, 9. Juli 2020 13:09
An: mkgmap development
Betreff: [mkgmap-dev] Bad routing on eTrex and MapSource

Hi Gerd

I've assembled the data to demonstrate a major routing failure. It
might be relate to the problems you are investigating but might not. I
noticed this problem a while ago and it fails on r4295.

 fastest time - it takes a long detour
 shortest distance - it goes the wrong way and makes a u-turn
BaseCamp (r4561):
 either mode - it goes the wrong way and makes a u-turn

BaseCamp behaviour has changed over the last few svn changes. Some
versions have worked correctly.

In the route details, some of the leg bearings look suspect.

Inverting the route gives correct results.

Here is a minimal map:

and the resultant .img I generate:

.gpx file with start/end points and MapSource fastest route are
attached, also .sh script.

I've been testing it with an old default style (from r4295) but it
fails in the same way with the current default style


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