[mkgmap-dev] [PATCH v2] modify road speed and class from a POI

Wed Oct 14 23:41:00 BST 2009

Felix,

Last email for today - i'm fried.

> >> Just a small question. If I add to a poi { add road_speed_min='-1'; add 
> >> road_speed_min='1' } what happens if the original road had road_speed=0 
> >> will it be increased or stay at 0?
> >> (I assume and hope for the latter).
> >>     
> >
> > Yes, the min/max tags only have an effect if mkgmap:road-speed or
> > mkgmap:road-class are in use for the way in question.
> >
> > BTW - the syntax is mkgmap:road-speed-min and not road_speed_min as in
> > your example (I think you knew that, really)
> >   
> Hmm no, I find this confusing as in the lines file I have always been 
> using road_speed and road_class...
> Or is road-speed working everywhere?
> okay so now I use this:
> highway=traffic_signals  { add mkgmap:road_speed = '-1'; add 
> mkgmap:road_class = '-1'; add mkgmap:road-speed-min = '1' }
> 
> I noticed that setting only road_speed or road_class was not significant 
> enough. with the min values we have no I will try whether maybe
> highway=traffic_signals  { add mkgmap:road_speed = '-2'; add 
> mkgmap:road-speed-min = '1' } is more appropriate.

the reason why these new things are using mkgmap:tag syntax is
because I think they should be easily distinguishable from any other
tag that may appear in the OSM input. i.e. the mkgmap: prefix should
achieve that. Things like road_speed and road_class are special 'magic'
tokens that the style engine recognises, they are not related to the
XML tag/value pairs in the OSM input. So, keep using road_class and
road_speed as before but use the mkgmap:tag syntax for the values that
are introduced by this new capability.

Cheers,

Mark