[mkgmap-dev] [PATCH] turn restrictions - alpha code for testing

Mon Feb 23 18:07:08 GMT 2009

Hi Alan,

> First off, superb work on mkgmap and routing - my Vista HCx regularly
> gets new maps as new features are added!  Thanks very much.

Cheers!

> At http://www.openstreetmap.org/browse/relation/79516, there is an
> offset crossroads where it is acceptable to approach Boroughgate from
> Beech Hill, but not from Manor Square.  (On a "normal" crossroads, it
> would be acceptable to go straight on to Boroughgate, but not to turn
> left or right into it).  The crossroad is sufficiently offset that the
> centre point has been added as a way rather than a node.  The via part
> of the turn restriction is on a way, rather than a node.
> 
> Either this is a reasonable example of having a way as the via part,
> or there is a better way for me to have added the turn restriction.
> Does anyone have any alternative suggestions?

I have looked at that junction - interesting.

The problem I have at the moment is understanding how to convert a 'via'
way into a turn restriction (or, perhaps, restrictions) as understood
by the gps.

I shall think about this and maybe others will be able to help.

It's early days for this capability.

Cheers,

Mark