[mkgmap-dev] [PATCH v2] grok unpavedness

Mon Dec 7 23:02:15 GMT 2009

Patch seems to work mighty fine. I exchanged add toll=yes with add 
unpaved=yes and got the same behaviour.

I think you can commit it to trunk.

This leaves only Ferries and Seasonal Road Closures missing from mkgmap. 
(or has anyone any success using avoid ferries?) to complete the 
avoidance features.

(and a way to tweeze arcs so that they are NOT considered U-Turns)

On 07.12.2009 23:34, Mark Burton wrote:
> v2 - sans syntax error
>
> ---------
>
> Bloody typical, you wait around for ages hoping for a new routing
> capability to be added to mkgmap and then two come along on
> the same day.
>
> I've been trying to discover how unpavedness is encoded for at least 6
> months. Every now and again, I return to think about it some more.
> Check and re-check the same old data structures. Very
> frustrating, no progress. Damn those cunning bastards at Garmin....
>
> However, a month or two ago, I discovered that Table C contains more
> than just turn restrictions. I still don't know many of it's little
> secrets but, today, having exhausted all other possibilities, I finally
> twigged that Table C contains the key to understanding "unpavedness".
> Gotcha!
>
> The attached patch allows you to add either unpaved=yes/true/1 or
> paved=no/false/0 to a way and then it will be ignored for routing
> purposes when the GPS has been told to avoid unpaved roads.
>
> Not sure if those are the best tags to use - any thoughts?
>
> BTW - the unpaved road line type 0x0a has nothing to do with
> unpavedness, it's just a routable way that gets drawn as a dashed line
> (default rendering).
>
> Feedback, etc.
>
> Mark
>    
>
>
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