Re: [Tagging] Formally informal sidewalks

2017-07-13 Thread marc marc
Le 13. 07. 17 à 15:28, Svavar Kjarrval a écrit :
> the local public transport authority started utilising OSM
good :-)

> 1. Sometimes streets don't have formal sidewalks (no markings on the
> street nor signs) but there is an "common sense expectation" that
> pedestrians are allowed to traverse on the edge of that street, and also
> cross it anywhere using caution. 
> This can cause problems for routing software
can you give an exemple ? I never see this problem.
I just test GraphHopper and Mapzen on 2 streets without sidewalk without 
any routing problem.

Regards,
Marc
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Re: [Tagging] Formally informal sidewalks

2017-07-13 Thread John Willis


> On Jul 13, 2017, at 10:28 PM, Svavar Kjarrval  wrote:
> 
> when the "common sense" approach would be to "just go
> across the street".

This is a question I have too, and I’m wondering if this is something you solve 
at the tagging or engine level. 

Afaik, this is why the roads have the sidewalk=left/right/both tag - so the 
sidewalk is considered “part of the road” and routing engines do not have to 
think about what side of the road you are on. 

Places with complicated and separate footpaths need Highway=footway, but this 
is the downside to that. 

I wonder if adding foot=yes tag to the roads without sidewalks and and foot=no 
to ways where it is dangerous would help. 


In places complicated enough to warrant separate footpaths, then assuming they 
*cannot* cross the street wherever they want (and forced to go to crosswalks or 
signals) is by far the best choice. But where this complicated sidewalk tagging 
ends, and the minor, residential, and service roads without sidewalks begin 
interests me greatly. Is there a “footway_link” ? Not a traditional _link road, 
but a logical link to when sidewalks end - do they need some kind of “link” to 
the adjacent road so Routing continues on? 

Currently, in some situations I link them to the adjacent road segment or 
across an intersection with crossing+crossing=unmarked, but I am unsure if this 
is necessary or proper. 

Javbw 



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Re: [Tagging] Formally informal sidewalks

2017-07-13 Thread Martin Koppenhoefer


sent from a phone

> On 13. Jul 2017, at 15:28, Svavar Kjarrval  wrote:
> 
> 1. Sometimes streets don't have formal sidewalks (no markings on the
> street nor signs) but there is an "common sense expectation" that
> pedestrians are allowed to traverse on the edge of that street, and also
> cross it anywhere using caution. The maximum speed is considered low
> enough, but they are not technically living streets. This can cause
> problems for routing software since it generally doesn't have a basis to
> assume this behaviour is alright.


I don't know which jurisdiction you are talking about, but walking on the edge 
of the street seems perfectly legal in many places (in absence of sidewalks or 
if you are carrying big loads that would be a nuisance to other pedestrians on 
a sidewalk), with the exception of motorways and motorroads. The same for 
crossing anywhere, provided you are farther away than x meters of a signed 
crossing (where x around here is 100 meters if I recall correctly, and 0-30-100 
meters in other European countries) and it is not a road restricted to motor 
vehicles (motorway etc.) and you believe it is safe to do so. Actually the only 
countries I am aware of restricting pedestrians (jaywalking) from crossing 
anywhere (when "reasonably far" away from traffic lights and crossings) are the 
US, Canada and Singapore.

I don't know how current routers handle this case, and it is clearly preferable 
walking on decent sidewalks than on the road, but in absence of sidewalks the 
router should still be able to lead pedestrians over a road.

Cheers,
Martin 




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Re: [Tagging] Formally informal sidewalks

2017-07-13 Thread Andy Townsend

Perhaps a few links to photos would help?

It'd make it a lot easier for other people to visualise.

Best Regards,

Andy


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[Tagging] Formally informal sidewalks

2017-07-13 Thread Svavar Kjarrval
Hi.

A few months ago the local public transport authority started utilising
OSM data to offer a service where people can type in two addresses and
receive an interactive map with suggested bus routes, including the path
between the addresses and the suggested bus stops. The estimated walking
distance, based on the path to and from the bus stops, are used in the
calculation.

However, there are some issues regarding tagging I have yet to resolve
and would like your advice:

1. Sometimes streets don't have formal sidewalks (no markings on the
street nor signs) but there is an "common sense expectation" that
pedestrians are allowed to traverse on the edge of that street, and also
cross it anywhere using caution. The maximum speed is considered low
enough, but they are not technically living streets. This can cause
problems for routing software since it generally doesn't have a basis to
assume this behaviour is alright.

2. Same as #1, but there can be sidewalks along the street and no
crossings, including unmarked ones. People are expected to cross the
street wherever they need, using caution. This can cause some long
walking routes if the two addresses are directly opposite each other on
such a street, when the "common sense" approach would be to "just go
across the street".

3. Same type of street as #2, except the sidewalk just stops a few
meters before the street ends. There are no clear markings on location
but there's the unwritten expectation that they are supposed to continue
on the street. This is common when there's a small cul-de-sac space at
the end of a residential street in which they don't widen the street at
the end to allow cars to turn around, but instead they let the sidewalks
end prematurely.

I do agree that we shouldn't tag purely for the router so I'm not
suggesting that. What I am considering is if there are already commonly
accepted OSM solutions already available to tackle these issues. Or,
alternatively, tags or other methods which would aid routers in making
such decisions and also conform with the OSM tagging norms at the same time.

With regards,
Svavar Kjarrval


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[Tagging] direction value for panorama view?

2017-07-13 Thread Harald Hartmann
Since OpenTopoMap announced [1] a customize rendering for the tourism=viewpoint 
[4] symbol depend on direction, we discuss [2] what would be the correct value 
for the 360 panorama view.

The wiki [3] defined values from 0 to 359 (!). Range values aren't defined yet, 
but are in use, because it's common and intuitive for tourism=viewpoint.

Would be 0-360 fine?

Mention: 360=0=N

[1] https://forum.openstreetmap.org/viewtopic.php?pid=653006#p653006
[2] https://forum.openstreetmap.org/viewtopic.php?pid=653279#p653279
[3] https://wiki.openstreetmap.org/wiki/Key:direction
[4] https://wiki.openstreetmap.org/wiki/Tag:tourism%3Dviewpoint___
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