Re: [Tagging] SF Muni tram lines are layer=1?

2012-12-17 Thread Ben Laenen
On Monday 17 December 2012 18:13:37 Clay Smalley wrote:
 On Mon, Dec 17, 2012 at 12:50 AM, Clay Smalley claysmal...@gmail.comwrote:
  I noticed the majority of the trackage of the San Francisco Muni lines
  are tagged as layer=1, while the streets along which they run have no
  layer tag (an implied layer=0).
  If the Muni lines are layer=1, it is my understanding that the Muni lines
  should be physically above the street.
  Since this is not the case and the lines run at street level, should I
  remove the layer tag on these specific tracks (to imply layer=0)?
 
 Soo, it's okay for me to remove the layer tag on _these_ bits of track?

Yes it is.

Ben

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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] [Talk-us] Variable max speed corridors

2011-12-30 Thread Ben Laenen
On Friday 30 December 2011 06:32:43 Martijn van Exel wrote:
 On Thu, Dec 29, 2011 at 10:29 PM, Paul Johnson ba...@ursamundi.org wrote:
  On Thu, 2011-12-29 at 22:12 -0600, Martijn van Exel wrote:
  Variable max speed corridors are nothing new for Europe, but they
  apparently are a novelty for the US.
  Is there an established tagging convention for this?
  
  http://www.katu.com/news/local/Variable-speed-limit-signs-are-coming-to-
  Portland-136326623.html
  
  For this area, the maxspeed will never be over 50 mph, so I don't see a
  reason to change the existing maxspeed.
 
 I don't either. An additional tag may be appropriate though.
 maxspeed=signals is mentioned on
 http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Maxspeed#discussed_
 future_extensions but that would override any fixed maxspeed. Maybe
 maxspeed:variable=yes.

I'm using these tags:

maxspeed=variable

and to specify somewhat to give you a range on what to expect:

maxspeed:variable:max=50
maxspeed:variable:min=30

It's mostly being used here for zone 30's near schools where the signs are 
turned on when children are going to or coming from school, and also for 
highways with digital speed signals.

Greetings
Ben

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Re: [Tagging] convention for multiple maxspeed values

2011-04-25 Thread Ben Laenen
M∡rtin Koppenhoefer wrote:
 2011/4/25 David Murn da...@incanberra.com.au:
  The signs I saw applied to
 
  trucks and buses though, more than just hgv/goods.  As Tobias said, your
  suggestion is suitable, Id add the suggestion of maxspeed:bus also.
 
 bus in OSM is defined as a bus performing public transport service
 [1]. I recently added tourist_bus as this was required for local
 jurisdiction (I found an explicit sign: tourist buses [2]).
 
 There is also another issue with busses: the wiki definition (in [1])
 defines busses as vehicles with more than 12 seating positions, which
 surely is some national legislation, but in other countries this
 number might vary (e.g. in Germany it is 8)

It's probably more than 8 passengers + 1 driver in Germany as well, so a bus 
has at least 10 seats (including driver).

 so I suggest to adjust
 this text to a generic term.

Even better would be to just not define these vehicles internationally at all 
and let each jurisdiction decide on which vehicle tags to use for what. Making 
international definitions only confuse new people when they later see other 
rules for their country and drive them towards tagging wrong things. And it 
has been shown often enough: you can't mold the entire world into one tag set.

Greetings
Ben

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Re: [Tagging] difference between cycletrack and cycleway

2011-04-18 Thread Ben Laenen
Sander Deryckere wrote:
 This mail is about the different (and incompatible) usages of the tag
 highway=cycleway
 
 [...]

 So the sollution create a new tag comes to the mind. I believe this is
 the preferred sollution, but* I ask your input about what the tag would
 be*. We could
 
- create one new tag and leave highway=cycleway for the solitaire
cycleway (which is the most used type).
- or create two new tags for the different ways. This makes it easy to
deprecate the old highway=cycleway tag and replace them by new.
 
 I look forward to all reactions.


We've already solved this in Belgium (and talk-be@ is the better place to 
discuss this since this rule is different in every country):

highway=cycleway is to be used when it is signed with the round blue sign of a 
cycleway, regardless of its location. Most of these will indeed be cycleways 
belonging to a road, but there are a few cycleways on itself in the country 
(even though it's IMHO not the best option according to the traffic code)

for other paths that don't belong to a road where cars can go, use 
highway=path -- and add access tags if there are other traffic signs, like 
vehicle=no + bicycle=yes


A router should detect the highway=cycleway parallel to the road and make use 
of it (probably easier said than done).


Greetings
Ben

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Re: [Tagging] difference between cycletrack and cycleway

2011-04-18 Thread Ben Laenen
Sander Deryckere wrote:
 Sorry to post this in the wrong mailing list then. So almost all cycleways
 going through the country
 should be tagged as paths (since they rarely have such a sign). Well, then
 there is a lot of work to do.
 
 I believe this discussion can be closed.

This page may be helpful to know what tags to use: 
http://wiki.openstreetmap.org/wiki/User:Eimai/Belgian_Roads#Paths

Greetings
Ben

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Re: [Tagging] [OSM-talk] A warning about gates and other barriers

2010-09-19 Thread Ben Laenen
Richard Fairhurst wrote:
 Wow. The OSM wiki never ceases to disappoint with its limitless provision
 of confusing, badly written, half thought-out crap.
 
 So we have a page that says implies access=no and then happily
 contradicts itself by saying an entrance that can be opened or closed to
 get through the barrier. That's can be opened (access=yes), not can't
 be opened (access=no).
 
 It's probably just as well the wiki documents, not defines. And given the
 vast preponderance of highway=gate nodes within (say) highway=footway ways,
 the wiki docs look pretty unambiguously wrong.
 
 Anyway, follow-ups to tagg...@.

The problem with it as I see it is that it makes use of access tags to define 
what can pass. I'm pretty sure that right now a lot of barriers are only 
tagged with bicycle=yes while at the same time there's nothing at those 
barriers that prevent access to mopeds or even motorcycles, or horses.

So for barriers we want something that describes the physical state of the 
barrier (and specifically how big the openings are). And this should be 
something general like pedestrians only (and this would exclude e.g. 
pushchairs), small traffic (pedestrians, bicycles, mopeds, etc), and wide 
traffic (cars and everything else), and an extra limitation on horse drivers 
and some other ones (needs to be thought out first obviously). After all, if 
you get off your bicycle, you become a pedestrian, but some of these barriers 
don't allow you to get a bicycle to the other side even with a lot of 
acrobatics, something your bicycle router might be interested in if you tell 
it to allow small parts to be walked next to your bicycle.

And if there are explicit signs limiting the traffic to specific vehicle 
classes, *then* you should use access tags.

Furthermore, in many cases, extra tags aren't really needed anyway on the 
barrier nodes, the tags on the paths or roads behind the barrier usually have 
all the needed tags. If a gate is always closed then a road behind it may 
often be access=private already.


So my idea: define sensible physical defaults for each barrier type 
(barrier=bollard blocks wide traffic for example). And if it's not really 
possible to make a good default (like barrier=gate) then by default allow 
everything that's allowed on the highways at both sides of that gate.

Greetings
Ben

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Re: [Tagging] Zone 30 (maxspeed)

2010-07-06 Thread Ben Laenen
Sebastian Klein wrote:
 usages tag
 -- ---
 944zone:maxspeed=DE:30
 631zone:traffic=DE:30
 516source:maxspeed=traffic_zone
 433source:maxspeed=DE:zone30
 152zone:speed=30
 140maxspeed:zone=yes
  40source:maxspeed=zone30


Also add maxspeed:zone=school for a zone 30 which has the status of a school 
zone in Belgium (has the same zone 30 signs but with an extra traffic sign on 
top and has a special definition in our traffic code). There's also a 
vacation zone, but I don't think anyone has been tagging those in a special 
way.

btw, I created the maxspeed:zone= tag because it (a) allows extension to a few 
other zonal restrictions (no parking zone etc), and (b) allows extra values 
like school.

Greetings
Ben

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Re: [Tagging] Proposing bazaars

2010-06-06 Thread Ben Laenen

Please make a proposal page first before making the new Tag:highway=bazaar 
page. This looks like a tag which needs quite some discussion first.

Greetings
Ben


pavithran wrote:
 First of all I am using a non native english name called 'bazaar'
 which most of you might have heard from 'cathedral and bazaar' .
 What is bazaar ?
 Shopping streets in developing countries tend to be very narrow and
 are buzzing with activity . They are heavily crowded with less chance
 of trucks,cars,auto rikshaws,motorcycles and bicylces passing through
 them . But nevertheless they do pass through them somehow or the other
 . The traffic is haphazard .
 
 How to map bazaar ?
  Mapping shops in bazaars is completely impossible(atleast to show)
 with current zoom level . Its also hard to accurately get a point with
 just a tracker . Being physically present with a specially designed
 POI collector could help map the bazaars which are closely connected .
 
 How to tag ?
 Well I started a wiki page which could be further expanded .
 http://wiki.openstreetmap.org/wiki/Tag:highway%3Dbazaar
 
 Regards,
 Pavithran
 

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Re: [Tagging] What's a power=station?

2010-01-19 Thread Ben Laenen
Steve Bennett wrote:
 On Tue, Jan 19, 2010 at 5:51 PM, Ulf Lamping ulf.lamp...@googlemail.com 
wrote:
  d) I don't think it's a good idea to change a tag description two years
  after it was documented, because the wording is slightly wrong for
  some parts of the english speaking world.
 
 The wording is *completely* wrong for the *entire* english speaking world.
 
 Definition of power=generator: power station
 Definition of power=station: substation
 Definition of power=sub_station: transformer
 
 I don't think you can get much wronger than that. And it doesn't
 appear to be a US english vs other english problem. Although power
 station (to mean power=generator) is more common outside the US, I
 don't think they use the term there to mean power=sub_station (as
 implied). Someone can correct me if I'm wrong.

foot=no would also literally mean that people would be allowed if they had no 
feet.

Maybe the English speaking world should start joining the rest of the world 
which have to learn definitions of each tag anyway. So OSM may have awkward 
tags for English speaking persons, but if we really have to try to resolve all 
tags that would look strange in some language (e.g. amenity=cafe is not what 
we call a café in Dutch) then the only option would be to use index numbers 
(amenity=135...) (*).

This is really a non-issue. Just learn the definition as it has been written 
on the wiki for years instead of blindly following your definition of a 
certain word, like the rest of the world. Now you're telling that the entire 
world has to learn new definitions because your definition of the word isn't 
the same as the defintion of the tag.

Greetings,
Ben


(*) Oh, right, actually we do use index numbers, except that we use 
power=station instead of power=4569.

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Re: [Tagging] bicycle=no

2009-12-06 Thread Ben Laenen
James Livingston wrote:
 On 05/12/2009, at 4:14 AM, Anthony wrote:
  On Fri, Dec 4, 2009 at 12:59 PM, Matthias Julius li...@julius-net.net
  wrote: I guess it is implied that when you are not allowed to carry a
  bike you are not allowed to ride it neither.
 
  True, but when I tag bicycle=no, I don't intend to imply anything about
  whether or not you are allowed to carry a bike.  It may be allowed.  It
  may not be allowed.
 
 I'd hope that bicycle=no would have the same implications for having a
  bicycle without riding it as other *=no tags would for their transports.
  For example I would guess that where horse=no is used, you often can't
  walk your horse as well as not riding it. So maybe having a separate tag
  for things which are not allowed (e.g.
  prohibited=bicycle;horse;explosives) could be the way to go.

Don't know how it's in other countries, but if you walk next to your horse 
over here, you're still its driver, so you have to obey all the traffic 
rules like if you were riding it (you're not walking it as a pedestrian on the 
pavement I presume). If a traffic signs doesn't allow horses, you can't take 
the bicycle loophole where you're not considered driving it when you're 
walking not it.

Same for motorcycles for example: if you're walking next to a motorcycle with 
the engine turned off, you're still driving that motorcycle. You'd even be 
allowed to enter roads that don't allow pedestrians.

Since access rules apply to drivers of those vehicles, it's not really an 
issue here.

Greetings
Ben

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Re: [Tagging] [OSM-talk] Path vs footway vs cycleway vs...

2009-11-28 Thread Ben Laenen
Steve Bennett wrote:
 On Sun, Nov 29, 2009 at 12:14 AM, Richard Fairhurst
 
 rich...@systemed.net wrote:
  highway=footway - a path intended for pedestrian use
  highway=cycleway - a path intended for pedestrian and cycle use
  highway=bridleway - a path intended for pedestrian and horse use[1]
 
 Boy, I like this way of thinking. Of course, it must be controversial
 given the preceding comments, but it does make a lot of sense.

And at one time it was that easy in OSM, but the real world really isn't. In 
some countries it may work fine, but in other countries the distinction 
between the three has no connection with the actual situation and would 
introduce a number of ambiguities where you don't really know anymore whether 
something is allowed or not.

Take cycleways for example. Over here mopeds are allowed on paths that are 
signed as cycleway. Now, on the other hand we also had paths which weren't 
cycleways but allowed bicycles (but no mopeds) tagged as cycleway. Conflict 
between the two: would a route planner now allow mopeds on them or not? Sure, 
one could explicitly tag the moped=yes/no but (a) mappers forget about it, and 
(b) even if they don't, they often do not know the exact rules. And not 
forgetting that (c) traffic code isn't some static thing, it changes over time 
and what has been allowed on a certain path with certain signs, may not be in 
future.

Hence the addition of highway=path was actually a welcome additional tag. Now 
we can tag the paths that are legal cycleways as highway=cycleway (and 
likewise for footpaths and bridleways), and other paths with the generic 
highway=path. The traffic signs on those paths can then be translated to 
access tags.

Greetings
Ben

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