[mkgmap-dev] Route Restrictions

Fri Dec 20 15:20:13 GMT 2013

Hi,

okay, I think I understand now better. 
mkgmap r2889 writes all route restrictions
so that they prohibit pedestrians and emergency vehicles.
RouteRestriction contains this:
 HEADER = 0x004005;
If I change that to 
0x004605
(as the wiki suggests) routing is allowed for pedestrians and emergency.

So, we can control whether restrictions apply to pedestrians and emergency.

Now I wonder if the old behaviour was intended? 
I think no. Both emergency and pedestrians can ignore
signs like "no left turn", can't they?

Gerd

GerdP wrote
> Hi Steve,
> 
> I'd like to change the code for the --link-pois-to-ways option
> so that POI with access restrictions (e.g. barriers or gates)
> are converted to route restrictions instead of short way segments with 
> limited access as this doesn't represent the real meaning
> of the POI.
> 
> My problem: Current implementation doesn't support 
> route restrictions that apply to pedestrians or emergency.
> On the other hand I found this link:
> wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/NOD_Subfile_Format#Table_C
> 
> It claims that the exceptions for pedestrian and emergency is stored in
> the 
> header bytes. On the other hand, it also claims that this header contains
> a number
> of ways, and I don't see that we write this.
> 
> I guess mkgmap writes another format of the table C. Do you think this can
> be changed
> without much work?
> 
> Gerd
>  
> 
> 
> 
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