[Routing] [motorway_link] description of direction

[OJ W]

One company in the UK is actually taking photos of the roadsigns (to
display on a printed map)

it's used to produce maps like this:

http://www.cuesim.com/map.htm


On Sun, Jun 15, 2008 at 4:32 PM, Nic Roets <nroets at gmail.com> wrote:
> On Sun, Jun 15, 2008 at 1:35 PM, Jon Bright <jon at siliconcircus.com> wrote:
>> tag a given node for example as
>>
>> signpost=Dortmund, Münster
>>
>> Or
>>
>> signpost:1=Dortmund, Münster
>> signpost:2=Dortmund, Münster
>> signpost:3=Wuppertal, Köln
>> signpost:4=Sprockhövel
>
> This is very motorway / motorcar specific. Many roads in Africa and on
> hiking trails are not signposted and can only be described by free
> form strings.
>
> I propose that we either tag the destination way e.g. the
> motorway_link, or use 1 relation for each possible maneuver
> (from='source' to='dest'). It's up to the routing program to look
> ahead for signpost messages.
>
> We need 2 sets of instructions :
> * Freeform instructions that will typically be produced by a website
> or non-gps device. For example the motorway_link that goes to
> Wuppertal can be tagged with "At the Acme junction, take the middle
> lane for the exit marked 'Wuppertal'". For messages fitting a certain
> layout, we can have machine translation into other languages e.g.
> using 'sed'.
> * A message from a predetermined set that can easily be turned into
> audible instructions on a resource poor GPS. The tag must also encode
> the distance before the intersection that the instructions must be
> played. It can even be a set of instructions e.g. "200m
> StayInMiddleLane; 100m StayInLeftLane; 50 JoinMotorway"
>
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