[OSM-talk-be] agglomération

[Ben Laenen]

On Wednesday 21 November 2012 20:17:49 A.Pirard.Papou wrote:
> How is an agglomération tagged?
> With residential ways?

There's no real method that's in use right now to map built-up areas. 
Residential vs unclassified doesn't work at all in these cases. The method 
which is used most often is to map nodes where the traffic signs are, with 
"traffic_sign=city_limit".

There aren't many other options right now. Polygons aren't used for it, and 
would be impossible as well: motorway not part of the built-up area with a 
bridge over it which does belong to it.

You can also map the maxspeed=50, and add a maxspeed:source=built-up_area. 
Sure, there will then be many roads with different maxspeed where that source 
tag cannot be added, but it at least maps the effect of the traffic sign.


> Is my reasoning correct that I should I make a relation containing the
> roads?

Can be done, but then you'll create huge relations in the big cities.

 
> But how do I tag it so that software recognize it as an agglomération as
> described above???

As said, no accepted method right now...

Ben