Re: [Tagging] Gritting routes

2014-03-26 Thread Pieren
On Tue, Mar 25, 2014 at 9:55 PM, Rob Nickerson
rob.j.nicker...@gmail.com wrote:

 I'm in two minds about whether to map the route as a relation, but I have to
 follow the route on the map just to work out which roads are gritted and
 which are not, so I may add it at the same time. Also if I add them to OSM
 then I can demonstrate a benefit to the local council - they could use the
 OSM data in a navigation device in the gritting trucks (thus ensuring that
 the correct route is followed every time and that excess grit is not
 wasted).

You could do this with a separate kml or xml dataset. The question
already raised by others here is the benefit for OSM if the route is
only used by one consumer, is not visible on the ground, is not
permanent and not verifiable...

Pieren

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Re: [Tagging] Gritting routes

2014-03-26 Thread Martin Koppenhoefer
2014-03-25 21:55 GMT+01:00 Rob Nickerson rob.j.nicker...@gmail.com:

 I'm in two minds about whether to map the route as a relation, but I have
 to follow the route on the map just to work out which roads are gritted and
 which are not, so I may add it at the same time.



the problem with a route will be that others have to deal with it when
modifying the road geometry, and it will be almost impossible to do it
without the descriptions. I also agree that the route data is not of
primary (or secondary ;-) ) interest to osm. Instead you could add an
attribute to the roads whether there is winter service or not. This is
already done somewhere, e.g. with the tag gritting
http://taginfo.openstreetmap.org/search?q=gritting
and with the tag winter_service

cheers,
Martin
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Re: [Tagging] Gritting routes

2014-03-25 Thread Rob Nickerson
 Craig said:

What is the point in mapping roads where the gritter drives, if it is
not gritting there? How is that useful for anyone?


In the UK any government data based on a map tends to be derived from the
national mapping agency and as such creates licence issues. We therefore
opt to use the gritting route schedules. These are literally a list of
instructions in the form:

* Leave depot, turn Right
* GRIT to end of road, turn left
* TRAVEL to main street, turn left
* GRIT to ...

and so on...

I'm in two minds about whether to map the route as a relation, but I have
to follow the route on the map just to work out which roads are gritted and
which are not, so I may add it at the same time. Also if I add them to OSM
then I can demonstrate a benefit to the local council - they could use the
OSM data in a navigation device in the gritting trucks (thus ensuring that
the correct route is followed every time and that excess grit is not
wasted).

Regards,
Rob

p.s. For some context, whether a road is gritted or not is quite important
in the UK as we are lazy and don't tend to bother with winter tyres/chains
etc.. There is a fine balance between gritting more so that the roads are
kept moving (economic and safety benefit) and gritting less to reduce
direct costs and the corrosion/environmental cost of excess salt/grit.
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Re: [Tagging] Gritting routes

2014-03-24 Thread Craig Wallace

On 2014-03-23 22:07, Rob Nickerson wrote:

Hi All,

I have some winter gritting/salting routes that I am trying to work out
how best to tag them. I was thinking of creating a route relation, but I
may need to add some new roles:

* forward:grit implies the gritting truck grits this road whilst
travelling in the direction of the way.
* forward:travel implies the gritting truck drives along the direction
of the way but does NOT grit it.

Is this ok?


What is the point in mapping roads where the gritter drives, if it is 
not gritting there? How is that useful for anyone?
It is useful for drivers to know whether or not a road will be gritted, 
but it doesn't matter what order the roads are gritted, or where the 
truck goes before or after.


I suspect most of these routes are not really fixed, different drivers 
could cover the roads in a different order if they wanted to.


Comparing it to bus routes, you only map where the bus is actually 
carrying or picking up passengers, not where it is driving empty to and 
from the depot.



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[Tagging] Gritting routes

2014-03-23 Thread Rob Nickerson
Hi All,

I have some winter gritting/salting routes that I am trying to work out how
best to tag them. I was thinking of creating a route relation, but I may
need to add some new roles:

* forward:grit implies the gritting truck grits this road whilst
travelling in the direction of the way.
* forward:travel implies the gritting truck drives along the direction of
the way but does NOT grit it.

Is this ok?

I also have a concern that JOSM warns me if I try to add the same road way
to the route twice. For gritting routes this is necessary - for example,
grit Road A to roundabout, u-turn and travel back on Road A (but do not
grit). In this example Road A would have to be added to the relation twice
first as forward:grit and then as backward:travel.

Is it okay if I ignore JOSMs error in this case?

Regards,
Rob
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Re: [Tagging] Gritting routes

2014-03-23 Thread Peter Wendorff
Hi Rob,
it's only a warning of josm. Read it as: Hey, you made something which
may be an error. Are you sure it's what you wanted to do? and if you
answer this question with yes, ignore it

On the other hand:
What's the benefit of having gritting routes in osm? are they stable?
Are they followed like bus routes, or changed according to weather
conditions and other parameters?

It may be my experience in mid-western Germany, away from any bigger
mountain, but here at most there are severity levels for particular
streets (which are first rank gritted, which are unimportant and so on).

If it's unstable or changing from year to year I would suggest not to
tag them at all.

regards
Peter

Am 23.03.2014 23:07, schrieb Rob Nickerson:
 Hi All,
 
 I have some winter gritting/salting routes that I am trying to work out how
 best to tag them. I was thinking of creating a route relation, but I may
 need to add some new roles:
 
 * forward:grit implies the gritting truck grits this road whilst
 travelling in the direction of the way.
 * forward:travel implies the gritting truck drives along the direction of
 the way but does NOT grit it.
 
 Is this ok?
 
 I also have a concern that JOSM warns me if I try to add the same road way
 to the route twice. For gritting routes this is necessary - for example,
 grit Road A to roundabout, u-turn and travel back on Road A (but do not
 grit). In this example Road A would have to be added to the relation twice
 first as forward:grit and then as backward:travel.
 
 Is it okay if I ignore JOSMs error in this case?
 
 Regards,
 Rob
 
 
 
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[Tagging] Gritting routes

2014-03-23 Thread Rob Nickerson
Thanks,

Happy to ignore JOSMs error, but don't want to have someone else change my
route relation if it flags as a QA bug (hence posting here to gather
people's thoughts  ideas).

They're as stable as bus routes in my area as the local authority has to
ensure the correct roads are gritted and the best way to do this is to have
prearranged routes.

Rob
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