[mkgmap-dev] check if road is connected to one side only

Thu Mar 21 14:10:27 GMT 2013

On 21.03.2013 14:26, GerdP wrote:
> Hi Felix,
>
> yes, it is quite easy to implement that check, I already did it for oneways
> only (on my pc only) for the dead-end-check.
> The only problem are roads which cross tile boundaries, for those we have to
> disable the check because we will not know whether there are other roads on
> the other side of the boundary.
no prob, those are not the majority anyhow. If we can catch 99% easily, 
then let's catch them and don't care about 1% if that's twice the work...
>
> Question is how to implement the change in attributes. As you know, the
> check occurs after the style was evaluated, so we'd need something like
> a special tag with a simple rule, maybe
> "mkgmap:dead-end-check-action=set road_class=&road_class - 2"
> The interpretation would be quite complex.
> The only other solution that I see is the two-pass interpreter that I
> already suggested,
> with a new rule file roads. I did not find a simple change to implement
> this, but
> I did not try long.
>
> Any ideas?
well it could be an option, but then I'm against further flooding the 
options menu...

so either add a roads file to the style, for actions to be run later 
(sounds clean and opens up for future functionality), or a complex call 
from the lines file.
For me both is equally fine....
>
> Gerd
>
>
>
>
>
>
> Felix Hartmann-2 wrote
>> Would it be (without too much programming effort, nor too much
>> computation time) possible to extend the current is connected check, to
>> check for streets/lines connected to one side only?
>> I would love to have road_class and road_speed lowered by 2-
>> respectively -1 if this is the case....
>>
>> Advantage would be a nicer routing graph I imagine - and thereby maybe a
>> little improvement for long distance routing...
>>
>> -- 
>> keep on biking and discovering new trails
>>
>> Felix
>> openmtbmap.org & www.velomap.org
>>
>> _______________________________________________
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>> mkgmap-dev at .org
>> http://lists.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
>
>
>
>
> --
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-- 
keep on biking and discovering new trails

Felix
openmtbmap.org & www.velomap.org