[mkgmap-dev] [PATCH v1] - Reduce number of Table A entries required

Tue Sep 22 10:54:02 BST 2009

Mark Burton wrote:
> Hi Marko,
>
>   
>> I successfully tested it on Finland with Edge 705 firmware 2.90.  The map
>> is slightly smaller (36 megabytes instead of 37) and routing (car and bicycle,
>> 200 to 250 km distance) still works.  It still makes a stupid detour for
>> the bicycle route, but I would blame that on the Garminware.
>>
>>     
>>> So, all feedback is welcome regarding the effect this patch has on
>>> routing performance. With the patch, the routing changed and I thought
>>> it was more sensible but perhaps that's just wishful thinking.
>>>       
>> It could be that the bicycle route calculation was faster with this patch,
>> but then again, there were not that many streets to choose from in my test.
>> Calculation of bicycling routes through cities has always been slowest
>> (multiple minutes).
>>     
>
> Thanks for trying it out. It doesn't change anything specific to
> bicycle routing so it won't suddenly make the garmin bicycle routing
> fantastic but, hopefully, it will tend to improve routing performance
> rather than making it worse.
>
>   
I just played around a bit in Mapsource, and couldn't notice ANY 
difference. If routing does not work somewhere without this patch, it 
will not work either with the patch. If it works without patch, it does 
so with patch too. (I installed the otherwise exact same map twice in 
Mapsource, setup routes and then change maps and click on recalculate). 
The chosen ways are also 1:1 identical.

I have yet to try on my Vista HCx.
Are you sure that there was a difference on the NUVI? Did you really 
install the otherwise exact same map twice (of course with different FID)?

My sample map size decreased from 67.3MB to 65.5MB.  Compressed with 
7-zip the size decrease is less (46.4 to 45.8 MB)
> Cheers,
>
> Mark
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>   
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