[OSM-talk-be] Some maxspeed mapping questions

[Ben Laenen]

On Thursday 10 November 2011 17:31:10 Marc Gemis wrote:
> I've read the wikipage on maxspeed tagging, but I have the following
> questions:
> 
> - How does one tag the end of a zone, I cannot find the number of that sign
> ? Start zone should be tagged with BE:F4a

Zone traffic signs don't have numbers (with the exception of a zone 30 which 
has a specific sign number). You could invent something like zone(C43[50]) for 
a zone 50.

> - How do you tag different speeds for 'cars' and e.g. +5t ?

Doesn't really have an agreed way of tagging. I made an effort solving this by 
making http://mijndev.openstreetmap.nl/~eimai/verkeersborden/ (not finished, 
don't look at the highway tags; use Firefox, maybe Chrome works as well). 
Click the signs and the tags appear.

In this case it would be something like
maxspeed = 70
maxspeed[weight>5] = 50

It's sufficient that everyone understands it, the exact syntax doesn't matter 
too much for now, since there are no programs able to read it anyway for now.

> - In case I create individual nodes for the the traffic sign (as requested
> on the wiki page), how do I indicate the direction for which the sign is
> meant ?

This is an unsolved question... Some may use directions like N/E/S/W for 
north/east/south/west. But then you also need to be able to attach the node to 
the proper way (bridges and dual carriageways make this a difficult problem).

Greetings
Ben