[mkgmap-dev] why do we have mkgmap:road-speed-class ?

Sat Dec 28 09:52:54 GMT 2013

lines:
include 'inc/roadspeed';
highway=* & lanes > 2 { set mkgmap:road-speed=+1 }

The roadspeed include sets the road speed. After that you need a 2nd tag 
to modify the road speed.

WanMil

> Hi WanMil,
>
> I still don't understand. Please give an example where
> mkgmap:road-speed-class has to be used because mkgmap:road-speed
> will not work.
>
> Gerd
>
>
>  > Date: Sat, 28 Dec 2013 09:20:20 +0100
>  > From: wmgcnfg at web.de
>  > To: mkgmap-dev at lists.mkgmap.org.uk
>  > Subject: Re: [mkgmap-dev] why do we have mkgmap:road-speed-class ?
>  >
>  > > Hi WanMil,
>  > >
>  > > I fear I don't understand the meaning of this new tag.
>  > > Docu says:
>  > > "A value between 0 and 7. Overrides the road_speed definition in the
>  > > element type definition if this tag is set."
>  > >
>  > > We have mkgmap:road-speed which allows to increment, decrement or
> override
>  > > the road speed value in the element type definition.
>  > > Why did you introduce this new tag?
>  >
>  > mkgmap:road-speed already was already used so I could not just change
>  > its meaning.
>  > mkgmap:road-speed-class defines the speed classification whereas
>  > mkgmap:road-speed can define or modify a speed classification. But how
>  > do you want to modify an already set classification? That's not possible
>  > in the style because you don't have arithmetic expressions.
>  > That results in having mkgmap:road-speed-class which defines speed class
>  > (or better overrides the class defined in the GType) and a modifier
>  > mkgmap:road-speed. I propose to use mkgmap:road-speed as modifier only
>  > (prefixed with +-) but I could not remove the usage without prefixed +-
>  > because that would break existing style sheets.
>  >
>  > WanMil
>  >
>  > >
>  > > Gerd
>  > >
>  >
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