[mkgmap-dev] [PATCH] route recalculation sensitivity

Sun Apr 5 17:35:06 BST 2009

Hi Steve,

could you try if this patch works for you. It contains all changed bits 
in the various headers I found so far in the latest version of Free 
Malaysia Maps. Maybe some garmins need all this stuff. If your garmin 
supports route simulations you also might try if recalculation works on 
there maps http://www.malfreemaps.net/MFMv150.exe

Until know I was not able to decode 0x43. In simulation mode it is hard 
to measure the distance you really have to debug it on the road. I 
didn't noticed a different behavior between 0x110301 or 0x110401. Both 
worked fine on my nuvi.

Berni.

Steve Hosgood schrieb:
> 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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