[mkgmap-dev] [PATCH] route recalculation sensitivity

Fri Apr 3 09:56:45 BST 2009

Steve Hosgood wrote:
> Bernhard Heibler wrote:
>   
>> Please let me know if this also works for you guys.
>>
>>     
>
> I hate to rain on the parade, but this *doesn't* work for me
> (Streetpilot i3).
>
>   
Sadly I must confirm this. I built maps with mkgmap r991 (which has the
"fix") last night but it's still the same 250m recalculate-distance on
the Streetpilot i3.

What is (slightly) interesting is that the behaviour of the displayed
map and the navigator on the i3 appear to be disjoint.

You can quite clearly see that the "you are here" triangle jumps onto
the road you're really driving quite quickly as you depart from the
navigated route. It's just that the navigator doesn't notice and doesn't
announce "recalculating" until you're 250m off the navigator's route. I
think this had always been the case, even with the old constant of
0xD0401 in the TRE header.

Am I the only guy in the world trying to run OSM maps on a Streetpilot? :-(

Steve

PS:
I used the tool that I'd written to do a binary patch on existing maps
on my genuine Garmin map, looking for TRE headers and printing the value
of the mystery word at offset 0x43. There were plenty of them, and all
were 0x110301.

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