Hi WanMil,
WanMil wrote
> Hi all,
>
> looking at the 4 node restrictions I think I found a general bug in mkgmap:
>
> Both with polish (.mp) format and with OSM data we compute the
> routing nodes for which the restriction shoud be applied.
> In a second step we compute the arcs between these nodes.
> In this 2nd step we ignore the information about roads given with
> TRAFFROADS in polish format or the from,via, and to roles in OSM data.
>
> In the mkgmap algo, we just select the first direct arc (means: peace of
> road) between the nodes.
> If the nodes are connected with multiple arcs on different roads, this
> probably is too lazy, although it will not fail very often.
>
> I have to rewrite most of the code reg. restrictions to correct this..
>
> Gerd
Hi Gerd,
can you give an example?
Thanks!
WanMil
I noticed the possible error by looking at the code, I don't
have an example.
The probem may appear wherever two nodes are connected with
different roads.
Assume road r1 with nodes a,b, and c and road r2 with nodes b and c,
both are connected to road r3 with nodes c and d.
A restriction exists with from=r2 and to=r3 and via=c.
Depending on the ids of the roads, mkgmap might
create a wrong restriction using road r1 and r3.
Gerd
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