[Talk-il] conventions for tagging roads

Jahudie jahudie at googlemail.com
Sat Oct 18 22:16:44 BST 2008


Hi Yuri,

Your specification sounds great.
Just add it to the wiki page with maybe some examples of roads.
http://wiki.openstreetmap.org/index.php/WikiProject_Israel

Would be great to have some rules for the playing around with OSM.

Regards,
Jahudie


2008/10/18 Yuri Magrisso <yumariso at gmail.com>

>
> I've read some of the map features  descriptions again, regarding highways,
>> and it seems to be that you have the same intuition as they intended. The
>> description there does not rely on the state classification.
>>
>
> Yeah.. I kind of took a hint from there :)
> When we focus on Israel, though, we can set more clear / narrow
> requirements.
>
>
>>
>> highway=trunk
>> ===========
>> *Important roads that aren't motorways. Typically maintained by central,
>> not local government.
>> Need not necessarily be a divided highway. In the UK, many 2digit "A"
>> roads (eg A34) were formally designated Trunk roads although that
>> definition is no longer absolute... *
>>
>> There will probably be some correlation between state road classification
>> and the requirements for being an osm motorway/trunk/etc, but it shouldn't
>> be THE criteria.
>>
>
> Now that you say that, I realize that we can summarize the requirements for
> "highway=motorway" as roads classified as "highway" by the state. In that
> case I think there is a 100% correlation. I am not aware of any other state
> classifications that represent road quality, though. Road numbers don't seem
> to be based on road quality - there are many double digit roads that have a
> single lane and many with two lanes.
>
>
>>
>>
>> On Fri, Oct 17, 2008 at 3:53 PM, Yuri Magrisso <yumariso at gmail.com>wrote:
>>
>>> Hi,
>>>
>>> I started discussing with Baruch a new convention for tagging roads. I'll
>>> rehash things to have it all in one place -
>>>
>>> Currently the convention for tagging roads is based on the road numbers.
>>> A more reasonable approach would be to tag roads based on their quality,
>>> because then the coloring of the road would provide another useful bit of
>>> information. I think we can judge the road quality by the speed limit,
>>> number of lanes, types of intersections and their frequency. Here's a first
>>> version for a conventions that follow this principle:
>>>
>>> Intercity roads
>>>
>>> The tag "highway=motorway" should be used on roads that have a speed
>>> limit of 100 km/h or more, have at least two lanes in each direction and
>>> have multi-level intersections (no traffic lights or unregulated
>>> intersections). (I think traffic authorities give a speed limit of 100 or
>>> more only to roads that meet the other two conditions, so they may be
>>> redundant).
>>>
>>> The tag "highway=trunk" should be used on roads that have a speed limit
>>> of 90 km/h, have at least two lanes in each direction and have mostly
>>> traffic-light or multi-level intersections.
>>>
>>> The tag "highway=primary" should be used on roads that have a speed limit
>>> of 90 km/h, have one lane in each direction and a clearly marked side-lane.
>>> The tag "highway=secondary" should be used on roads that have two clearly
>>> separated lanes, one for each direction.
>>>
>>> The tag "highway=tertiary" should be used on roads that do not meet any
>>> of the above requirement sets (have only one lane), but at-least have
>>> asphalt layer.
>>>
>>>
>>> City roads
>>>
>>> Inside a city the "motorway" and "trunk" tags can be used if the
>>> intercity conditions are met, or if they are a continuation of a road having
>>> the same tag and the speed limit difference is no more than 10 km/h.
>>>
>>> The tag "highway=primary" should be used for roads that have a speed
>>> limit of 60 km/h or more, have at least two lanes in each direction and have
>>> mostly traffic-light crossroads, with no unregulated crossroads that cross
>>> the lanes in both directions.
>>>
>>> The tag "highway=secondary" should be used on roads that have a speed
>>> limit of 60 km/h or more, and have at least two lanes in each direction.
>>>
>>> The tag "highway=tertiary" should be used on roads with speed limit of 50
>>> km/h, that have two lanes in each direction.
>>>
>>> Roads with one lane in each direction should be tagged as
>>> "highway=residential". Roads on which pedestrians are given right should be
>>> tagged as "highway=living_street".
>>>
>>> City roads can be tagged as "primary" or "secondary" based on how central
>>> they are for the city even if they do not meet all the requirements. If you
>>> are not a resident of the city you can probably judge the importance of a
>>> road by the presence of important commercial or administrative buildings
>>> like a mall or a municipality.
>>>
>>> What do you think?
>>> Yuri
>>>
>>>
>>>>
>>>> Hi Yuri,
>>>>
>>>> Baruch has sent you a message through OpenStreetMap with the subject
>>>> "Re: road conventions":
>>>>
>>>> ==
>>>> Hi,
>>>>
>>>> I agree about that, the road numbers are only good as a first degree
>>>> approximation. I did notice road number 3 which is fine but not motorway
>>>> quality and it was a worse road before that.
>>>>
>>>> If you can whip up a proposal we can flesh it out and offer it on
>>>> talk-il. Better yet, email it to talk-il so that everyone can participate in
>>>> the discussion.
>>>>
>>>> Baruch
>>>>
>>>> On Thu Oct 09 14:53:00 +0100 2008 Yuri wrote:
>>>>
>>>> > Hi Baruch,
>>>> >
>>>> > I have a few suggestions on how to tag roads. The basic idea is that
>>>> the road type should represent the road quality so to say. If we tag roads
>>>> according to their numbering we are not giving any additional useful
>>>> information.
>>>> >
>>>> > I think that the primary factors for choosing the road type should be
>>>> the speed limit, the number of lanes and the type of intersections on the
>>>> road.
>>>> > For example to qualify a road as 'motorway' it should have a speed
>>>> limit of 100 or above, have at least two lanes and use multi-level
>>>> intersections (no traffic lights). For trunk roads the speed limit should be
>>>> 90, again at least two lanes, but you can have traffic light intersections.
>>>> >
>>>> > If you like the idea, we can ping-pong a more detailed convention -
>>>> for intercity roads it is fairly easy. For city roads it will be more
>>>> problematic, but we can set up some guidelines there too.
>>>> >
>>>> > You can email me at yumariso at gmail dot com.
>>>> >
>>>> > Best regards,
>>>> > Yuri
>>>> ==
>>>>
>>>>
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