[mkgmap-dev] Routing issues

Fri Feb 8 19:11:34 GMT 2013

In general it is not possible to download data this way and combine it.
There is a high chance that the boundary nodes are missing and that is
where routing brakes. To some extend Garmin devices will fix missing
connections and fall back to the basemap routing to find a rout between
tiles.
It is highly recommended to download an extract for the whole area or cut
it out from a planet or a big enough extract. Then use splitter to split it
into 2 part.
If the island is really small you could download the whole from XAPI or
Overpass

On Fri, Feb 8, 2013 at 10:37 AM, <mkgmap-dev at salo.mailrange.com> wrote:

>  I think it makes a lot of sense. Maybe I should clarify it further:
> - If I calculate a route that is completely within the top part of the
> island, everything's fine.
> - If I calculate a route that is completely within the bottom part of the
> island, everything's fine.
> - If I calculate a route that goes across the two parts of the island, the
> base map streets seem to be the only ones that provide a way across the
> "border". With gmapbmap.img that results in our crappy route, without
> gmapbmap.img that results in no route at all.
>
>
>
> On 09/02/13 05:30, Jaakko Helleranta.com wrote:
>
> Hmm . That sounds interesting/odd (to me, a non developer). Are you
> implying that you loose routing capability to _OSM_ data's POIs?
>
>  I wonder what information there is in that gmapbmap.img if that's the
> case... But more so: I've always understood that the unit routes purely
> with the OSM-derived .img. .. But as noted, I'm no dev person and my
> technical understanding of this is limited.
>
>  -Jaakko
>  --
>  jaakko at helleranta.com * Skype: jhelleranta * Mobile: +509-37-269154  *
> http://go.hel.cc/about.me
>
>
> On Fri, Feb 8, 2013 at 12:44 PM, <mkgmap-dev at salo.mailrange.com> wrote:
>
>>  Thanks Jaakko, I'm pretty sure that the problem is indeed related to
>> gmapbmap.img (the "wrong" street has the same shape as one of the streets
>> that show up when I disable my gmapsupp.img).
>>
>> However, when I delete the gmapbmap.img, I loose routing capabilities to
>> many of the POIs and addresses! Is there another way? Maybe edit the
>> gmapbmap.img to delete the streets (it's only a few)?
>>
>> There is another theory I have: As you can see in our wget commands, we
>> are downloading the island in two parts. It seems that the routing has
>> issues only when going between the two parts. Maybe the overlap isn't big
>> enough? Does anybody know the minimum required overlap?
>>
>>
>>
>>
>> On 09/02/13 04:08, Jaakko Helleranta.com wrote:
>>
>>  Checked the video: Looks _exactly_ like my basemap problem.
>> -Jaakko
>>
>> On Fri, Feb 8, 2013 at 12:00 PM, Jaakko Helleranta.com <
>> jaakko at helleranta.com> wrote:
>>
>>> I didn't look at the video but what you describe sounds like a pesky
>>> problem I have experienced before.
>>> My solution was to delete the global basemap(?) from the device memory.
>>> It's an .img file of about 50MB. Solved the problem.
>>> Cheers,
>>> -Jaakko
>>>  --
>>>  jaakko at helleranta.com * Skype: jhelleranta * Mobile: +509-37-269154  *
>>>  http://go.hel.cc/about.me
>>>
>>> On Fri, Feb 8, 2013 at 11:36 AM, Fabian S. <
>>> mkgmap-dev at salo.mailrange.com> wrote:
>>>>
>>>>
>>>> we are having a problem with the maps: In some cases, the routing uses
>>>> streets that don't exist!
>>>>
>>>
>>
>>
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