Re: [Tagging] agglomération

2012-11-26 Thread Simone Saviolo
2012/11/23 Kytömaa Lauri lauri.kyto...@aalto.fi

 The idea is that with a 30 driving rules list applying to an agglomération

 If it's just the traffic rules urban vs. rural, there's the tag (with 37
 000+ uses)

 zone:traffic=**:rural
 zone:traffic=**:urban

 where ** is the two letter country code.

 Don't count on anything ever deriving the rules (like maxspeed) from that
 tag, so tag the maxspeed anyway.


Sorry Kytömaa, if you need to tag the maxspeed anyway, then what's the
point of that tag?

Are we saying that maxspeed is a prioritary tag, one so important because
of its applications that it has to be always specified even if there are
other tags that imply it?

Regards,

SImone
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Re: [Tagging] agglomération

2012-11-26 Thread Jo
zone:traffic=**:rural
zone:traffic=**:urban

source:maxspeed=zone30
highway=living_street

have an effect on other traffic rules as well, so it's important to know
that's the 'regime' the street is under.

As a data consumer I also prefer to have the maxspeed be tagged explicitly.
That's true for mapcss styles (in JOSM) and websites showing a map with
maxspeeds as well. KISS.

Cheers,

Polyglot


2012/11/26 Simone Saviolo simone.savi...@gmail.com

 2012/11/23 Kytömaa Lauri lauri.kyto...@aalto.fi

 The idea is that with a 30 driving rules list applying to an
 agglomération

 If it's just the traffic rules urban vs. rural, there's the tag (with 37
 000+ uses)

 zone:traffic=**:rural
 zone:traffic=**:urban

 where ** is the two letter country code.

 Don't count on anything ever deriving the rules (like maxspeed) from that
 tag, so tag the maxspeed anyway.


 Sorry Kytömaa, if you need to tag the maxspeed anyway, then what's the
 point of that tag?

 Are we saying that maxspeed is a prioritary tag, one so important because
 of its applications that it has to be always specified even if there are
 other tags that imply it?

 Regards,

 SImone

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Re: [Tagging] agglomération

2012-11-26 Thread Philip Barnes
 I think that is very country specific, not something that can be tagged 
worldwide.
In the UK, beyond speed limits, there are no rule differences between urban and 
rural roads.
However you have me curious, how do you see the rules as different?

 Phil
--

Sent from my Nokia N9



On 26/11/2012 10:37 Jo wrote:

zone:traffic=**:rural
zone:traffic=**:urban

source:maxspeed=zone30
highway=living_street

have an effect on other traffic rules as well, so it's important to know that's 
the 'regime' the street is under.

As a data consumer I also prefer to have the maxspeed be tagged explicitly. 
That's true for mapcss styles (in JOSM) and websites showing a map with 
maxspeeds as well. KISS.

Cheers,

Polyglot




2012/11/26 Simone Saviolo simone.savi...@gmail.com

2012/11/23 Kytömaa Lauri lauri.kyto...@aalto.fi

The idea is that with a 30 driving rules list applying to an agglomération


If it's just the traffic rules urban vs. rural, there's the tag (with 37 000+ 
uses)

zone:traffic=**:rural
zone:traffic=**:urban

where ** is the two letter country code.

Don't count on anything ever deriving the rules (like maxspeed) from that tag, 
so tag the maxspeed anyway.



Sorry Kytömaa, if you need to tag the maxspeed anyway, then what's the point 
of that tag?



Are we saying that maxspeed is a prioritary tag, one so important because of 
its applications that it has to be always specified even if there are other 
tags that imply it?


Regards,


SImone
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Re: [Tagging] agglomération

2012-11-26 Thread Kytömaa Lauri
Simone Saviolo:
 if you need to tag the maxspeed anyway, then what's the point of that tag?

It's not about the maxspeed, but the area that supposed to be considered 
urban, and interesting in itself.

The rural/urban distinction affects other rules, even outside of the traffic 
code. 

Here the traffic rule differences are, at least the following:
- no honking in urban areas, except in case of danger
- no unnecessary(!) driving in urban areas
- no parking on marked priority roads in rural areas.
- in rural areas, only marked junctions (guideposts or a traffic sign) forbid 
overtaking
- different rules for lights in parked cars
- stricter rules about distances between slow vehicles in rural areas

Examples of non-traffic implications include
- dogs always on leash in urban areas, and one must collect the poop (with 
conditions).
- (disruptive) drinking forbidden in urban areas
- smaller traffic signs allowed in urban areas, with less spacing between them, 
and between them and the road

Even the state funding for municipalities depends somehow on the population 
within the urban area, among many other things.

-- 
Alv
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Re: [Tagging] agglomération

2012-11-26 Thread Craig Wallace

On 26/11/2012 11:25, Philip Barnes wrote:

  I think that is very country specific, not something that can be
tagged worldwide.

In the UK, beyond speed limits, there are no rule differences between
urban and rural roads.

However you have me curious, how do you see the rules as different?


In the UK there are rules about using dipped headlights in built-up 
areas, plus not using the horn overnight.

Not sure if there's any other rules.


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Re: [Tagging] agglomération

2012-11-26 Thread Philip Barnes
Had forgotten the horn one, although the rule says 'except to avoid an 
accident', and there are really few other valid uses for the horn.
I did look up the full beam rule, and cannot find one. All I can find is a rule 
that says 'you must not use lights in a way to dazzle or cause discomfort to 
other road users, including pedestrians, cyclists and horseriders.

Phil
--

Sent from my Nokia N9



On 26/11/2012 13:50 Craig Wallace wrote:

On 26/11/2012 11:25, Philip Barnes wrote:
 I think that is very country specific, not something that can be
 tagged worldwide.

 In the UK, beyond speed limits, there are no rule differences between
 urban and rural roads.

 However you have me curious, how do you see the rules as different?


In the UK there are rules about using dipped headlights in built-up
areas, plus not using the horn overnight.
Not sure if there's any other rules.


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Re: [Tagging] agglomération

2012-11-26 Thread A.Pirard.Papou

Hi,

As I am against always changing the subject line of discussions, I 
resent with the original one.


But it's also to add that, in my opinion, the tagging must respect the 
categories that the national law defines (our code de la route).  There 
is no point in trying to forcefully adapt foreign concepts if they do 
not match.
I don't think there's a concept of built-up area in the Belgian law and 
I don't think there's a difference in the definition of an agglomération 
whether it resides in a city or in a village (even if rural sounds like 
village, this is not poetry).
This all, obviously, doesn't prevent a specific tag like a lower speed 
limit overriding the global one.


(On 2012-11-26 18:21, A.Pirard.Papou wrote :)

On 2012-11-23 22:58, Kytömaa Lauri wrote :

If it's just the traffic rules urban vs. rural, there's the tag (with 37 000+ 
uses)

zone:traffic=**:rural
zone:traffic=**:urban

where ** is the two letter country code.

On 2012-11-26 13:16, Marc Gemis wrote :
country_code:context (where the speed limit is defined by a 
particular context, for example urban/rural/motorway/etc.)


On 2012-11-26 16:41, Jo wrote :
One week ago I had never heard of the zone:traffic tags. I didn't have 
a clue how one could tag streets as part of built-up area/city limits 
or out of it. For many years this is something I have been wanting to 
do though. So I was glad I finally learned how it could/should be done 
in one of the many discussions started by Papou.


zone30 are mostly within built-up area, zone50 and zone70 aren't. I 
think it's important to distinguish between zoneXX and built-up area 
as they occur mostly independent from each other, so the namespaces 
also ought to be independent.


We could use source:maxspeed=BE:zone30 instead of 
source:maxspeed=zone30, but since a street already gets 
zone:traffic=BE:urban/rural, the BE seems less important in the 
source:maxspeed tags.


Great finding From Lauri indeed !!!

But regarding this, where is the complete zone:traffic=BE:*  list? (just 
one example)
In Belgium, we have more than urban/rural/motorway/etc. 
http://www.code-de-la-route.be/textes-legaux/sections/ar/code-de-la-route/100-art2


default=*rural*
agglomération=*urban*
autoroute=*motorway*
route pour automobile=*?*
zone résidentielle=*?*
zone de rencontre=*?*
zone piétonne=*?*
chemin réservé à la circulation des piétons, cyclistes et cavaliers=*?*
rue réservée aux jeux=*?*
Abords d'école= Zone 30=*?*
Rue cyclable=*?*

Each with their regulations details.

I was lately sent to map an alleged Zone30 area and there was no Zone 
30 but a /*zone résidentielle*/ which is equivalent maxspeed-wise but 
not other-wise (other-regulations-wise).


If we had a tag such as *INCLUDE:BE:...:urban* etc. with which the 
programs would fetch all the relevant tags like *maxspeed* per zone type 
from a well known per country or WW (world wide) database object (1) 
then we would have a clear list and we could tell the government that 
they can change details any time without sending us to work everywhere.


How could otherwise programs that are supposed to use the OSM data make 
sense of a such ever changing global notions without breaking them down 
to well-defined concepts such as speed, bicycles,  etc...


That would please both the global view and the piecewise one.

Wouldn't that stop the zonebabel?

Cheers,

André.


(1) for example some well-known BE relation that would contain a 
role=*zones* or *traffic* member to a relation that would similarly 
contain rural, urban, etc. pointers to nodes that would contain the tags


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Re: [Tagging] agglomération

2012-11-23 Thread A.Pirard.Papou

On 2012-11-22 16:57, Simone Saviolo wrote :
2012/11/21 A.Pirard.Papou a.pirard.pa...@gmail.com 
mailto:a.pirard.pa...@gmail.com


Hi,

I wanted to map the agglomeration of my village and I am wondering
again. [...]

How do we tag agglomérations?


Currently, with place=* and their relative info on a closed way. I 
have written a proposal which aims to change this tagging scheme: [1]


However, on a second thought, what you talk about is probably a 
different concept. An agglomération has precise entry and exit points, 
marked by the city limit sign - in Italy it's the same. I know that 
many mappers don't want to have this defined by a polygon, arguing 
that this would force consumers to do a spatial query to understand 
what the speed limit is; however, the legal constraint also involves 
other restrictions (e.g., no honking), and a dedicated tag would work 
better in this sense.

Hello everybody,

According to my explanation (well, my government's definition), an 
agglomération is just a set of roads and hence not an area nor a 
multipolygon (there's no speed limit or parking restrictions in the 
meadows ;-)) but, as I stated it, a plain relation. Yet, for larger 
cities (without meadows ;-)) a multipolygon could be used to gather 
already made subareas the day OSM will go recursing (nesting), but 
what's outside the roads is undecided.
The idea is that with a 30 driving rules list applying to an 
agglomération (some 10 practically), you'd better have a global idea of 
where it spans (e.g. highlight all its roads), entry/exit you speak of, 
rather than ask yourself and OSM the question for every new street you 
traverse.
As well as for exceeding the speed limit, you can be booked in 
agglomérations for parking partly on the roadside, or on the wrong 
alternated side, not letting a bus leave its stop point, etc...
Should there be a country-dependent agglomération tag, should the 
driving rules  be tagged one by one and should they be tagged on every 
road or on a relation?
Finally, should we try to tag everything or rather go and swim or play 
tennis?


Cheers,

André.



[1] http://wiki.openstreetmap.org/wiki/Proposed_features/Urban_settlements



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Re: [Tagging] agglomération

2012-11-23 Thread Jo
What I'm doing right now is tag the roads inside this zone with

maxspeed=50 and
source:maxspeed=city_limit.

This doesn't fit entirely, as it doesn't only influence maxspeed. Maybe
adding a tag city_limit=yes would be more appropriate?

Besides there is a conflict when inside those city limits there is a
zone30. I'm tagging those with

maxspeed=30 and
source:maxspeed=zone30.

The zone30 also has some extra consequences, besides maxspeed though. Would
it be more correct to use zone30=yes? We also have zone50 and zone70.

I have been tagging the location of city_limit signs for several years now,
but since we didn't have a tag for it, I simply used note=city limit or
bebouwde kom (nl). I hope a proper way of tagging them will come from this
discussion.

Polyglot



2012/11/23 A.Pirard.Papou a.pirard.pa...@gmail.com

  On 2012-11-22 16:57, Simone Saviolo wrote :

 2012/11/21 A.Pirard.Papou a.pirard.pa...@gmail.com

  Hi,

 I wanted to map the agglomeration of my village and I am wondering again.
 [...]



  How do we tag agglomérations?


  Currently, with place=* and their relative info on a closed way. I have
 written a proposal which aims to change this tagging scheme: [1]

  However, on a second thought, what you talk about is probably a
 different concept. An agglomération has precise entry and exit points,
 marked by the city limit sign - in Italy it's the same. I know that many
 mappers don't want to have this defined by a polygon, arguing that this
 would force consumers to do a spatial query to understand what the speed
 limit is; however, the legal constraint also involves other restrictions
 (e.g., no honking), and a dedicated tag would work better in this sense.

 Hello everybody,

 According to my explanation (well, my government's definition), an
 agglomération is just a set of roads and hence not an area nor a
 multipolygon (there's no speed limit or parking restrictions in the meadows
 ;-)) but, as I stated it, a plain relation. Yet, for larger cities (without
 meadows ;-)) a multipolygon could be used to gather already made subareas
 the day OSM will go recursing (nesting), but what's outside the roads is
 undecided.
 The idea is that with a 30 driving rules list applying to an agglomération
 (some 10 practically), you'd better have a global idea of where it spans
 (e.g. highlight all its roads), entry/exit you speak of, rather than ask
 yourself and OSM the question for every new street you traverse.
 As well as for exceeding the speed limit, you can be booked in
 agglomérations for parking partly on the roadside, or on the wrong
 alternated side, not letting a bus leave its stop point, etc...
 Should there be a country-dependent agglomération tag, should the driving
 rules  be tagged one by one and should they be tagged on every road or on a
 relation?
 Finally, should we try to tag everything or rather go and swim or play
 tennis?

 Cheers,

   André.

 [1] http://wiki.openstreetmap.org/wiki/Proposed_features/Urban_settlements




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Re: [Tagging] agglomération

2012-11-23 Thread Kytömaa Lauri
The idea is that with a 30 driving rules list applying to an agglomération

If it's just the traffic rules urban vs. rural, there's the tag (with 37 000+ 
uses)

zone:traffic=**:rural
zone:traffic=**:urban

where ** is the two letter country code.

Don't count on anything ever deriving the rules (like maxspeed) from that tag, 
so tag the maxspeed anyway.

If, on the other hand, it's about the area that is considered agglomerated, 
irrespective of the (not) implied traffic rules, there are probably/apparently 
different rules in every country for calculating the area, for example by 
buffering all residential buildings and combining the area formed by that 
operation.

-- 
Alv


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Re: [Tagging] agglomération

2012-11-23 Thread Jo
I'm a bit unhappy with the term urban instead of built-up or
city_limit/city_limits. But it's better than source:maxspeed=city_limits,
so I'll start using it.

Hopefully it gets out of the proposed state one day, it was proposed in
2009

Jo


2012/11/23 Kytömaa Lauri lauri.kyto...@aalto.fi

 The idea is that with a 30 driving rules list applying to an agglomération

 If it's just the traffic rules urban vs. rural, there's the tag (with 37
 000+ uses)

 zone:traffic=**:rural
 zone:traffic=**:urban

 where ** is the two letter country code.

 Don't count on anything ever deriving the rules (like maxspeed) from that
 tag, so tag the maxspeed anyway.

 If, on the other hand, it's about the area that is considered
 agglomerated, irrespective of the (not) implied traffic rules, there are
 probably/apparently different rules in every country for calculating the
 area, for example by buffering all residential buildings and combining the
 area formed by that operation.

 --
 Alv


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Re: [Tagging] agglomération

2012-11-22 Thread Simone Saviolo
2012/11/21 A.Pirard.Papou a.pirard.pa...@gmail.com

  Hi,

 I wanted to map the agglomeration of my village and I am wondering again.
 [...]



 How do we tag agglomérations?


Currently, with place=* and their relative info on a closed way. I have
written a proposal which aims to change this tagging scheme: [1]

However, on a second thought, what you talk about is probably a different
concept. An agglomération has precise entry and exit points, marked by the
city limit sign - in Italy it's the same. I know that many mappers don't
want to have this defined by a polygon, arguing that this would force
consumers to do a spatial query to understand what the speed limit is;
however, the legal constraint also involves other restrictions (e.g., no
honking), and a dedicated tag would work better in this sense.

Regards,

Simone

[1] http://wiki.openstreetmap.org/wiki/Proposed_features/Urban_settlements
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Re: [Tagging] agglomération

2012-11-21 Thread sly (sylvain letuffe)
On mercredi 21 novembre 2012, A.Pirard.Papou wrote:
 Hi,

Hi,

 OSM-talk-fr sounds like associating agglomération and speed limit.

I don't think we do. 
A french agglomération implies some speed limits (bellow 50km/h)
But speed limits doesn't imply you are in an agglomération.

An agglomération is more than that, and I don't think there currently is an 
agreed way to tag them...
 
 However, at least in Belgium, the definition of agglomération is very 
 strict 
Same here :
http://fr.wikipedia.org/wiki/Agglom%C3%A9ration#France

 How is an agglomération tagged?

I would suggest something in the place=something format + name=x
And if the wiki doesn't give any clues, it might be that we just need someone 
writing a proposal and start discussing that matter.

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

Do you mean roads as member of a relation ? I wouldn't advise to do that, but 
maybe draw an area around the agglomeration, or, before that, start 
discussing it on the wiki.
 
 But how do I tag it so that software recognize it as an agglomération as 
 described above???

When a new tag is created, chances are that no software will reconize it right 
away, but by explaining somewhere how you tagged it in a clear (and 
unambigous) way then everyone doing a software will know how to recognize it.

 Well, if I too consider just the speed limit, I see that Speed_limits 
 http://wiki.openstreetmap.org/wiki/Speed_limits applies to roads, 
 railways! and waterways!!!  Not relations !

That's the current state of recommendation, but maybe we could start 
discussing it to see if that's a good idea to apply speed limits on roads 
inside a bounding polygon

-- 
sly
qui suis-je : http://sly.letuffe.org
email perso : sylvain chez letuffe un point org

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Re: [Tagging] agglomération

2012-11-21 Thread Ben Laenen
On Wednesday 21 November 2012 20:52:50 sly (sylvain letuffe) wrote:
 That's the current state of recommendation, but maybe we could start
 discussing it to see if that's a good idea to apply speed limits on roads
 inside a bounding polygon

Polygons are a bad idea to map built-up areas. It's not uncommon that there's 
a bridge where the road on top belongs to the built-up area, but the road 
below does not. Or tunnels going under a built-up area, with the tunnel itself 
not part of it.

Ben

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Re: [Tagging] agglomération

2012-11-21 Thread A.Pirard.Papou

On 2012-11-21 21:26, Ben Laenen wrote :

On Wednesday 21 November 2012 20:52:50 sly (sylvain letuffe) wrote:

That's the current state of recommendation, but maybe we could start
discussing it to see if that's a good idea to apply speed limits on roads
inside a bounding polygon

Polygons are a bad idea to map built-up areas. It's not uncommon that there's
a bridge where the road on top belongs to the built-up area, but the road
below does not. Or tunnels going under a built-up area, with the tunnel itself
not part of it.

Ben

I didn't speak of a polygon (closed ways) but of a relation (a set of ways).
A speed limit on the roads doesn't prevent you driving as fast as you 
want in the meadows ;-)

Look at multilinestring, which I see as a swiss-knife way assembly.

In my mind, such a relation is the way to assign the same tags to a 
collection of objects making a whole with regard to those tags.  If we 
add recursion (nesting), which is very easy to do, that's powerful.


Cheers,

André.











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Re: [Tagging] agglomération

2012-11-21 Thread sly (sylvain letuffe)
Hi,

Le mercredi 21 novembre 2012 22:53:53, A.Pirard.Papou a écrit :
 Look at multilinestring, which I see as a swiss-knife way assembly.
 
 In my mind, such a relation is the way to assign the same tags to a
 collection of objects making a whole with regard to those tags.  If we
 add recursion (nesting), which is very easy to do, that's powerful.

You misunderstood the idea/goal behind the multilinestring proposal. It wasn't 
created to factorize tags of all members. It was used to record one real life 
feature made of 2 or more OSM way objects. (like a long river, a boundary 
between two countries all made of hundreds of ways) 

A key sentence has been added to avoid using it badly : 

Do not use it to group loose ways : Relations/Relations_are_not_Categories  
(like all path in a forest) Example : if the name is not the same for all 
those ways, then you'd better not use this relation

What you are looking for is a category thing to group loose ways sharing a 
common property but relation weren't made for that :
http://wiki.openstreetmap.org/wiki/Relations/Relations_are_not_Categories


-- 
sly (sylvain letuffe)

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