Re: [Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread Jack Challen


> From: Peter Miller 
> Incidentally, I was speaking to a senior professional person from the  
> South West a few days ago who was aware that OSM had just mapped MK  
> and was wishing that something similar could happen where he was. I  
> suggested that all he had to do was ask, be nice and offer warm beer  
> and pizzas at the end of the day from council funds!

Hmm... If it's anywhere near St. Austell I'd probably be willing to travel some 
distance for some well-kept Admiral's Ale and a decent lamb jalfrezi

In fact I wouldn't be surprised if mapping progress exhibited something like 
the Ballmer Peak[1]
The OSM mapping party: if you feed it, they will come...

cheers
jack

1: http://xkcd.com/323/



  

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Peter Miller

On 4 Jun 2009, at 17:11, WessexMario wrote:

> Robert Naylor wrote:
 On Thu, 04 Jun 2009 11:13:28 +0100, David Earl
  wrote:


> I also came across someone tagging maxpeed=NSL yesterday. If it  
> gives
> someone happiness, fine, but I don't really think it should be
> necessary
> to tag the default situation, only when there is an exception to  
> the
> general rule
>
>> This page seems to confirm this:
>> http://www.abd.org.uk/know_your_speed_limits.htm
>>
>>
> There is a major problem with using maxspeed=NSL.
> Dual Carriageways.
> How will the applications know that a way is part of a dual  
> carriageway
> or is just one oneway way that happens to be near another oneway way?

Here is a proposal for using relations to combine carriageways and  
also one for collecting together all the slip-roads into a single  
feature called 'junction':-

"To avoid duplication, the name/ref of the street should continue to  
be placed on the Ways of the street or in the Relation for the  
collected ways of a street. This relationship is only intended as a  
hint to renderers that the adjacent ways are actually part of the same  
street/road so the name could be positioned between the carriageways  
rather than in both, or the road number rendered only once for  
adjacent pairs of ways and similar applications.
http://wiki.openstreetmap.org/wiki/Relations/Proposed/Dual_carriageways

And this one for interchanges
"The main purpose of the Relation at present is to give renderers or  
route planners a name and or number for a junction. It also means that  
a staggered cross roads controlled by linked traffic signals can be  
grouped into the one junction while still maintaining the geometry of  
the streets correctly.
http://wiki.openstreetmap.org/wiki/Relations/Proposed/Junctions


Regards,


Peter


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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Andrew M. Bishop
Peter Miller  writes:

> I have been looking at the coverage of maxspeed limit data for  
> highways in the UK and we seem to have a right mix of styles.
>
> Here is the data for bug chunk of England while avoiding including  
> anything from France or Ireland (which would include km/hour figure).  
> We current have over 17,000 highway ways tagged with maxspeed and also  
> 300 ways tagged as 'maxspeed:mph'. You will notice that for 30 miles  
> per hour we have 30, 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808,  
> 48.28032 and 48.28.
>
> Any suggestion on what we should recommend for the UK? I guess the USA  
> should also be party to this discussion but they have far less  
> population of the maxspeed field (only 70 uses in the Bay area) so  
> possibly we should come to a view first.  Our options seem to be:-
> maxspeed=30mph (the user should strip a trailing mph to find the value)
> maxspeed=30   (leaving it for the user to realise that it is in the UK  
> and therefore imperial)
> maxspeed=30 mph (the user should strip the last word if it is mph  
> including the space)
> maxspeed:mph=30 (Easy for the user)
> maxspeed=48.28 (with a defined precision) For metric use no work by  
> the user, for imperial use a look-up table is required or a conversion  
> and rounding

This question is already answered on the OSM wiki:

http://wiki.openstreetmap.org/wiki/Key:maxspeed

The answer is that maxspeed=30mph is the recommended answer if the
native units are mph.

-- 
Andrew.
--
Andrew M. Bishop a...@gedanken.demon.co.uk
  http://www.gedanken.demon.co.uk/

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Ed Loach
> There is a major problem with using maxspeed=NSL.
> Dual Carriageways.
> How will the applications know that a way is part of a dual
> carriageway
> or is just one oneway way that happens to be near another
> oneway way?

http://wiki.openstreetmap.org/wiki/Relations/Proposed/Dual_carriagew
ays

If it's used widely enough it will no longer be proposed... ;)

Ed



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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread WessexMario
Robert Naylor wrote:
>>> On Thu, 04 Jun 2009 11:13:28 +0100, David Earl   
>>>  wrote:
>>>
>>>   
 I also came across someone tagging maxpeed=NSL yesterday. If it gives
 someone happiness, fine, but I don't really think it should be  
 necessary
 to tag the default situation, only when there is an exception to the
 general rule
 
> This page seems to confirm this:
> http://www.abd.org.uk/know_your_speed_limits.htm
>
>   
There is a major problem with using maxspeed=NSL. 
Dual Carriageways.
How will the applications know that a way is part of a dual carriageway 
or is just one oneway way that happens to be near another oneway way?



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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Ed Loach
> Adding another log to the fire...
> Is there a case for specifying knots in the same way as mph for
> waterway
> tags?

Maplint validation already allows this (maxspeed=10knots for
example, with or without a space)

Ed



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Re: [Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread Peter Miller

On 4 Jun 2009, at 15:01, Andy Allan wrote:

> Out of interest, how much would one of these tenders go for i.e. how
> much do people pay in the "real world" for this kind of thing? Are we
> talking £500, £50,000, £250,000?
>

No idea, but the tender process must have significant costs associated  
with it measured in £x,000. Anyway, I feel that the 'real world' is  
shifting and possibly in the real world' in future the answer will be  
'not very much just so as long as you work with people not against  
them'.

Incidentally, I was speaking to a senior professional person from the  
South West a few days ago who was aware that OSM had just mapped MK  
and was wishing that something similar could happen where he was. I  
suggested that all he had to do was ask, be nice and offer warm beer  
and pizzas at the end of the day from council funds!



Regards,



Peter


> Cheers,
> Andy
>
> On Thu, Jun 4, 2009 at 2:15 PM, Peter Miller  > wrote:
>>
>> The DfT have just published a contract out for the collection and
>> management of cycle data for St Leonards on Sea
>>
>> "Lot 1. Cycle data collection. Undertaking cycle surveys to extend  
>> the
>> Ordnance Survey Integrated Transport Network to include information
>> about existing cycling infrastructure and where cycling is permitted
>> and recommended. Cycle data will be provided in accordance to
>> CycleNetXChange specification (http://www.cyclenetxchange.org.uk/).
>>
>> "Lot 2 - Cycle data management. Managing the central database
>> including coordinating data collection, journey planner publishing,
>> data maintenance and quality assurance activities and managing local
>> authorities and data suppliers. These activities are supported  
>> through
>> the online data management tools provided by Transport Direct.
>> http://www.publictenders.net/modules.php?op=modload&name=News&file=article&sid=84033
>>
>> Should we give the place a review and ensure it is top notch for
>> cycling before the contact is awarded. The roads for the place seems
>> to be complete, however there is a distinct lack of footpaths and
>> cyclepaths in the town which seems unlikely. There is also a lack of
>> paths through parks and there are no cycle lanes/tracks on roads
>> according to OpenCycleMap. It might also need work on turn  
>> restrictions.
>>
>> The users retselkim, timsc, fyremoon and the_winch seems to be
>> reasonably active in the area. It is too far for me to go but might  
>> be
>> a good venue for a mapping party this summer - south coast, sun, sea,
>> ice cream etc ;)
>>
>>
>>
>> Regards,
>>
>>
>>
>> Peter
>>
>>
>>
>>
>>
>>
>>
>>
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Re: [Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread David Earl
It appears to be a suburb of Hastings - I couldn't find separate 
population data for it just now. Wikipedia thinks the full name is correct.

David

On 04/06/2009 14:56, Shaun McDonald wrote:
> It took me a while to find, as I was searching for:
> St Leonards-on-Sea
> However (assuming I've found the right place) it appears to be in the 
> data under just:
> St Leonards
> http://www.openstreetmap.org/browse/node/356906703
> 
> So, which is correct?
> 
> Map location:
> http://www.openstreetmap.org/?lat=50.86&lon=0.5493&zoom=14&layers=B000FTF
> 
> Shaun
> 
> On 4 Jun 2009, at 14:15, Peter Miller wrote:
> 
>>
>> The DfT have just published a contract out for the collection and
>> management of cycle data for St Leonards on Sea
>>
>> "Lot 1. Cycle data collection. Undertaking cycle surveys to extend the
>> Ordnance Survey Integrated Transport Network to include information
>> about existing cycling infrastructure and where cycling is permitted
>> and recommended. Cycle data will be provided in accordance to
>> CycleNetXChange specification (http://www.cyclenetxchange.org.uk/).
>>
>> "Lot 2 - Cycle data management. Managing the central database
>> including coordinating data collection, journey planner publishing,
>> data maintenance and quality assurance activities and managing local
>> authorities and data suppliers. These activities are supported through
>> the online data management tools provided by Transport Direct.
>> http://www.publictenders.net/modules.php?op=modload&name=News&file=article&sid=84033
>>  
>>
>>
>> Should we give the place a review and ensure it is top notch for
>> cycling before the contact is awarded. The roads for the place seems
>> to be complete, however there is a distinct lack of footpaths and
>> cyclepaths in the town which seems unlikely. There is also a lack of
>> paths through parks and there are no cycle lanes/tracks on roads
>> according to OpenCycleMap. It might also need work on turn restrictions.
>>
>> The users retselkim, timsc, fyremoon and the_winch seems to be
>> reasonably active in the area. It is too far for me to go but might be
>> a good venue for a mapping party this summer - south coast, sun, sea,
>> ice cream etc ;)
>>
>>
>>
>> Regards,
>>
>>
>>
>> Peter
>>
>>
>>
>>
>>
>>
>>
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Re: [Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread Andy Allan
Out of interest, how much would one of these tenders go for i.e. how
much do people pay in the "real world" for this kind of thing? Are we
talking £500, £50,000, £250,000?

Cheers,
Andy

On Thu, Jun 4, 2009 at 2:15 PM, Peter Miller  wrote:
>
> The DfT have just published a contract out for the collection and
> management of cycle data for St Leonards on Sea
>
> "Lot 1. Cycle data collection. Undertaking cycle surveys to extend the
> Ordnance Survey Integrated Transport Network to include information
> about existing cycling infrastructure and where cycling is permitted
> and recommended. Cycle data will be provided in accordance to
> CycleNetXChange specification (http://www.cyclenetxchange.org.uk/).
>
> "Lot 2 - Cycle data management. Managing the central database
> including coordinating data collection, journey planner publishing,
> data maintenance and quality assurance activities and managing local
> authorities and data suppliers. These activities are supported through
> the online data management tools provided by Transport Direct.
> http://www.publictenders.net/modules.php?op=modload&name=News&file=article&sid=84033
>
> Should we give the place a review and ensure it is top notch for
> cycling before the contact is awarded. The roads for the place seems
> to be complete, however there is a distinct lack of footpaths and
> cyclepaths in the town which seems unlikely. There is also a lack of
> paths through parks and there are no cycle lanes/tracks on roads
> according to OpenCycleMap. It might also need work on turn restrictions.
>
> The users retselkim, timsc, fyremoon and the_winch seems to be
> reasonably active in the area. It is too far for me to go but might be
> a good venue for a mapping party this summer - south coast, sun, sea,
> ice cream etc ;)
>
>
>
> Regards,
>
>
>
> Peter
>
>
>
>
>
>
>
>
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Re: [Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread Shaun McDonald

It took me a while to find, as I was searching for:
St Leonards-on-Sea
However (assuming I've found the right place) it appears to be in the  
data under just:

St Leonards
http://www.openstreetmap.org/browse/node/356906703

So, which is correct?

Map location:
http://www.openstreetmap.org/?lat=50.86&lon=0.5493&zoom=14&layers=B000FTF

Shaun

On 4 Jun 2009, at 14:15, Peter Miller wrote:



The DfT have just published a contract out for the collection and
management of cycle data for St Leonards on Sea

"Lot 1. Cycle data collection. Undertaking cycle surveys to extend the
Ordnance Survey Integrated Transport Network to include information
about existing cycling infrastructure and where cycling is permitted
and recommended. Cycle data will be provided in accordance to
CycleNetXChange specification (http://www.cyclenetxchange.org.uk/).

"Lot 2 - Cycle data management. Managing the central database
including coordinating data collection, journey planner publishing,
data maintenance and quality assurance activities and managing local
authorities and data suppliers. These activities are supported through
the online data management tools provided by Transport Direct.
http://www.publictenders.net/modules.php?op=modload&name=News&file=article&sid=84033

Should we give the place a review and ensure it is top notch for
cycling before the contact is awarded. The roads for the place seems
to be complete, however there is a distinct lack of footpaths and
cyclepaths in the town which seems unlikely. There is also a lack of
paths through parks and there are no cycle lanes/tracks on roads
according to OpenCycleMap. It might also need work on turn  
restrictions.


The users retselkim, timsc, fyremoon and the_winch seems to be
reasonably active in the area. It is too far for me to go but might be
a good venue for a mapping party this summer - south coast, sun, sea,
ice cream etc ;)



Regards,



Peter








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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Donald Allwright

>if a bot can do it then there's no reason the data consumers can't do
>it too without the bot.
>If you don't have a good reason to change something just leave it be.

Or alternatively, why not just run the bot on the copy of the data at the input 
to the renderer*, rather than on the database itself? The effect for the 
rendered map is the same.

* By renderer, I mean any consumer of the data (such as a routing algorithm) 
rather than just something that produces a visual representation of the data.

Donald



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[Talk-GB] UK-ST LEONARDS-ON SEA: CYCLE DATA COLLECTION & MANAGEMENT CONTRACT

2009-06-04 Thread Peter Miller

The DfT have just published a contract out for the collection and  
management of cycle data for St Leonards on Sea

"Lot 1. Cycle data collection. Undertaking cycle surveys to extend the  
Ordnance Survey Integrated Transport Network to include information  
about existing cycling infrastructure and where cycling is permitted  
and recommended. Cycle data will be provided in accordance to  
CycleNetXChange specification (http://www.cyclenetxchange.org.uk/).

"Lot 2 - Cycle data management. Managing the central database  
including coordinating data collection, journey planner publishing,  
data maintenance and quality assurance activities and managing local  
authorities and data suppliers. These activities are supported through  
the online data management tools provided by Transport Direct.
http://www.publictenders.net/modules.php?op=modload&name=News&file=article&sid=84033

Should we give the place a review and ensure it is top notch for  
cycling before the contact is awarded. The roads for the place seems  
to be complete, however there is a distinct lack of footpaths and  
cyclepaths in the town which seems unlikely. There is also a lack of  
paths through parks and there are no cycle lanes/tracks on roads  
according to OpenCycleMap. It might also need work on turn restrictions.

The users retselkim, timsc, fyremoon and the_winch seems to be  
reasonably active in the area. It is too far for me to go but might be  
a good venue for a mapping party this summer - south coast, sun, sea,  
ice cream etc ;)



Regards,



Peter








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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Dave Stubbs
2009/6/4 WessexMario :
>
>> Very helpful. And to be clear is says their should be a space between
>> the number and the unit, ie '50 mph' not '50mph'.
>
> I wouldn't get too concerned about the space, computers can handle that well, 
> so
> an optional whitespace should be allowable.
>
>> So. are we reaching a point where we should do some clean-up work on
>> the current tagging? Would that be appropriate?
>>
>> Should we add a space where required and convert the various km
>> interpretations to either fit the proper km conversion from the table,
>> or convert to mph.
>
> Definitely do a tidy up. It would be so much easier for all UK speeds to be in
> mph, both for data entry and validation. Let computers do the conversions to
> metric if they need to.
>
>> Is this something that Potlatch can do reasonably efficiently?
>
> Apparently there's a bot doing something reasonably efficiently somewhere.
> Is it helping or hindering?


being a pita.

if a bot can do it then there's no reason the data consumers can't do
it too without the bot.
If you don't have a good reason to change something just leave it be.

Dave

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread WessexMario

> Very helpful. And to be clear is says their should be a space between 
> the number and the unit, ie '50 mph' not '50mph'.

I wouldn't get too concerned about the space, computers can handle that well, 
so 
an optional whitespace should be allowable.

> So. are we reaching a point where we should do some clean-up work on 
> the current tagging? Would that be appropriate?
>
> Should we add a space where required and convert the various km 
> interpretations to either fit the proper km conversion from the table, 
> or convert to mph.

Definitely do a tidy up. It would be so much easier for all UK speeds to be in 
mph, both for data entry and validation. Let computers do the conversions to 
metric if they need to.

> Is this something that Potlatch can do reasonably efficiently?

Apparently there's a bot doing something reasonably efficiently somewhere.
Is it helping or hindering?
Mario

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Andy Allan
On Thu, Jun 4, 2009 at 11:13 AM, David Earl  wrote:
> you may well find
> that someone else goes round systematically changing them to km/h and
> puts in maxspeed:mph - that's what's happened to most of the ones I've
> done.

Call them out publicly. This kind of thing is a PITA, and we need to
make sure it doesn't happen. And letting them know such behaviour
isn't helpful is a good start.

Cheers,
Andy

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Peter Miller

On 4 Jun 2009, at 12:48, WessexMario wrote:

> Isn't all this already specified?
>
> http://wiki.openstreetmap.org/wiki/Key:maxspeed
> " If your country uses kilometers tag the value without unit! "
> " If your country still uses miles tag the value and append "mph" OR
> convert to the EXACT kilometers per hour value! "
> which is specified below to 5dp.

Very helpful. And to be clear is says their should be a space between  
the number and the unit, ie '50 mph' not '50mph'.
>
>
> The UK uses miles. so the first option doesn't apply
> In the UK, the correct value would be '30 mph" , NOT a value in kph.
>
> If applications don't cope with mph, then they need updating as  
> they're
> not following the specification.
>
> Adding another log to the fire...
> Is there a case for specifying knots in the same way as mph for  
> waterway
> tags?
> for speed limits in harbours, canals, rivers, ,,,

Makes sense.

Another log...  What about trains? Network Rail use mph, so I would  
suggest we do the same.



So. are we reaching a point where we should do some clean-up work  
on the current tagging? Would that be appropriate?

Should we add a space where required and convert the various km  
interpretations to either fit the proper km conversion from the table,  
or convert to mph.

Is this something that Potlatch can do reasonably efficiently?



Regards,


Peter


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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread David Earl
On 04/06/2009 12:48, WessexMario wrote:
> Isn't all this already specified?

The trouble is tag specifications count for very little in OSM, as 
people ignore them because they think they have a better way of doing 
it, or when they make a mistake, or just on a whim. They're conventions 
not specifications. It makes writing a data consumer a nightmare, 
especially one that isn't visual so the incentive for people to make it 
look right on a map isn't there.

David


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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread WessexMario
Isn't all this already specified?

http://wiki.openstreetmap.org/wiki/Key:maxspeed
" If your country uses kilometers tag the value without unit! "
" If your country still uses miles tag the value and append "mph" OR 
convert to the EXACT kilometers per hour value! "
which is specified below to 5dp.

The UK uses miles. so the first option doesn't apply
In the UK, the correct value would be '30 mph" , NOT a value in kph.

If applications don't cope with mph, then they need updating as they're 
not following the specification.

Adding another log to the fire...
Is there a case for specifying knots in the same way as mph for waterway 
tags?
for speed limits in harbours, canals, rivers, ,,,



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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Robert Naylor
On Thu, 04 Jun 2009 11:55:06 +0100, Tom Hughes  wrote:

> Robert Naylor wrote:
>> On Thu, 04 Jun 2009 11:13:28 +0100, David Earl   
>>  wrote:
>>
>>> I also came across someone tagging maxpeed=NSL yesterday. If it gives
>>> someone happiness, fine, but I don't really think it should be  
>>> necessary
>>> to tag the default situation, only when there is an exception to the
>>> general rule
>>  If the road has regular street lights then NSL isn't the default.   
>> I've  mapped a number of raods round here with maxspeed=national, but  
>> only the  ones with lit=yes.
>
> Yes it is, it's just that the NSL for such a road is 30mph. Assuming the  
> street lamps are close enough together that is.

I may be wrong as I don't drive, but my understanding is that 30mph isn't  
a national speed limit.  Its a default speed limit for a built up area,  
but not a national speed limit.

This page seems to confirm this:
http://www.abd.org.uk/know_your_speed_limits.htm


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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Douglas Furlong
2009/6/4 WessexMario 

> I propose that we adopt a new key:  maxspeed_mph
>

If we have maxspeed_mph, I would be far happier seeing.

maxspeed:mph
maxspeed:km/h

I don't like the idea of maxspeed and maxspeed_mph, we'll almost certainly
find things defaulting to maxspeed, when it should be maxspeed_mph.

I think having those two options makes more sense than having maxspeed
defaulting to km/h unless mph (or some thing similar) is entered.

Then in things like Josm, it can have two options for entering the speed, or
a radio button or or or.

As soon as the tag is explicitly one thing or another, the user will no
longer be inclined to convert from one thing or another.

The only down side I see, is that all of the applications that currently
work with maxspeed, would need to be updated.
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Douglas Furlong
2009/6/4 WessexMario 

>
> > you only need 5dp to get an exact mph->kph conversion anyway :-)
>
> I think that's the big issue.
>
> People won't be able to agree on whether we should enter 0, 2,3 or 5
> decimal
> places,


Personally I think it should be to 1 decimal place ;)
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread WessexMario

> you only need 5dp to get an exact mph->kph conversion anyway :-)

I think that's the big issue.

People won't be able to agree on whether we should enter 0, 2,3 or 5 decimal 
places, if anyone can remember or look them up correctly. And it's completely 
unintuitive thinking of speed limits with non factor 10 vaules with decimal 
places.

The accuracy for practical non-scientific use of the value is almost 
irrelevant, 
Journey times will vary more because of road conditions, speed cameras are set 
to a few mph above the limits, the legal requirement is for car speed to be 
measured to 10% accuracy.

The problem is someone is always going to enter the wrong values if it's done 
in 
kph, and we'll keep on having umpteen different values for what should be and 
exact figure, eg 30 mph.

The answer must be to have a solution that prefers 30,40,50,60,70 values in mph 
rather than (rounded or 5dp accurate) kph numbers,.

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Ed Loach
> FWIW highway code conversions are:
> 20mph = 32
> 30mph = 48
> 40mph = 64
> 50mph = 80
> 60mph = 96
> 70mph = 112

Ah - which differs from what is posted on roads out of ports:
http://wiki.openstreetmap.org/wiki/Image:MaxSpeedConversionHarwich.jpg
(60mph = 95km/h, 70mph=110km/h, and it looks like I didn't get the previous 
sign which gives all the other common speed limits in steps of 15km/h starting 
I think with 30mph=45km/h)

Ed



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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread David Earl
On 04/06/2009 11:55, Tom Hughes wrote:
> Robert Naylor wrote:
>> On Thu, 04 Jun 2009 11:13:28 +0100, David Earl  
>>  wrote:
>>
>>> I also came across someone tagging maxpeed=NSL yesterday. If it gives
>>> someone happiness, fine, but I don't really think it should be necessary
>>> to tag the default situation, only when there is an exception to the
>>> general rule
>>
>> If the road has regular street lights then NSL isn't the default.  
>> I've  mapped a number of raods round here with maxspeed=national, but 
>> only the  ones with lit=yes.
> 
> Yes it is, it's just that the NSL for such a road is 30mph. Assuming the 
> street lamps are close enough together that is.

Indeed, that's what I meant. I don't put a speed on each residential 
road, because it's known to be 30mph without me having to say so. For 
non residential in urban areas, I still tend to use abutters to say this 
road is urban, but that's largely in lieu of a good way to say "this is 
an urban area" at present - but that's a different discussion. Where 
there is an urban 40mph, that's where I mark speed explicitly, or a 
primary or trunk rural road which is 50 (like many of Derbyshire's, for 
example).

David


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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Tom Hughes
Robert Naylor wrote:
> On Thu, 04 Jun 2009 11:13:28 +0100, David Earl  
>  wrote:
> 
>> I also came across someone tagging maxpeed=NSL yesterday. If it gives
>> someone happiness, fine, but I don't really think it should be necessary
>> to tag the default situation, only when there is an exception to the
>> general rule
> 
> If the road has regular street lights then NSL isn't the default.  I've  
> mapped a number of raods round here with maxspeed=national, but only the  
> ones with lit=yes.

Yes it is, it's just that the NSL for such a road is 30mph. Assuming the 
street lamps are close enough together that is.

Tom

-- 
Tom Hughes (t...@compton.nu)
http://www.compton.nu/

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Dave Stubbs
2009/6/4 WessexMario :
> I propose that we adopt a new key:  maxspeed_mph

It exists: maxspeed:mph

Problems I'll do inline:

>
> It would be
>
> - simpler for UK, USA and other imperial countries to enter the speed.
>
> - less prone to error - users may not be used to kph speeds.
>
> - un-ambiguous.  (what does '50' mean?)

all can be fixed by supplying units "mph".

>
> - maxspeed keeps consistently metric units (kph)
>
> - exact - being in the local units, no rounding necessary (no decimal
> places).

you only need 5dp to get an exact mph->kph conversion anyway :-)

>
> - value will usually only be an integer in a multiple of 10 or 5. - easy
> to validate.

except in windsor great park where the speed limit is 38mph. People
have a tendency to round anyway, so it probably doesn't tell you much.

>
> - both maxspeed and maxspeed_mph keys could be entered - no ambiguity again

except if they happen to be different speeds maxspeed:mph=30
maxspeed=96... what do I do?

>
> - applications can easily convert between maxspeed and maxspeed_mph
> where only one is entered

as they can if there's a unit

>
> - in transition, having a separate key would make it simple for
> validators (people and computers) or a batch process, to convert
> existing maxspeed keys in the UK and USA from the various existing
> maxspeed variations to the expected multiples of 10 in maxspeed_mph

we've already got a fricking bot doing that and it's pissing people off.

Dave

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Robert Naylor
On Thu, 04 Jun 2009 11:13:28 +0100, David Earl  
 wrote:

> I also came across someone tagging maxpeed=NSL yesterday. If it gives
> someone happiness, fine, but I don't really think it should be necessary
> to tag the default situation, only when there is an exception to the
> general rule

If the road has regular street lights then NSL isn't the default.  I've  
mapped a number of raods round here with maxspeed=national, but only the  
ones with lit=yes.

-- 
Robert

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread WessexMario
I propose that we adopt a new key:  maxspeed_mph

It would be

- simpler for UK, USA and other imperial countries to enter the speed.

- less prone to error - users may not be used to kph speeds.

- un-ambiguous.  (what does '50' mean?)

- maxspeed keeps consistently metric units (kph)

- exact - being in the local units, no rounding necessary (no decimal 
places).

- value will usually only be an integer in a multiple of 10 or 5. - easy 
to validate.

- both maxspeed and maxspeed_mph keys could be entered - no ambiguity again

- applications can easily convert between maxspeed and maxspeed_mph 
where only one is entered

- in transition, having a separate key would make it simple for 
validators (people and computers) or a batch process, to convert 
existing maxspeed keys in the UK and USA from the various existing 
maxspeed variations to the expected multiples of 10 in maxspeed_mph

Mario
(WessexMario)




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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Richard Mann
I think a rude email to the talk list describing the bot and asking for
someone to fess up to it would be appropriate.

If someone is correctly tagging as per the wiki, why does anyone think a bot
is tolerable? This is exactly the sort of thing that puts people off
participating in the project.

Richard
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread David Earl
There is no right answer. If you tag things 40mph (which is what I do, 
like most of the other people who've replied) then you may well find 
that someone else goes round systematically changing them to km/h and 
puts in maxspeed:mph - that's what's happened to most of the ones I've 
done. I think it's being done with an occasional bot enforcing one 
user's opinion over the original mapper's.

Given there are, as usual, as many opinions as there are contributors, 
and the rule we have, unfortunately IMO, is that there are no rules, the 
only way this will be solved is for consumers to understand all the 
reasonable variations.

I also came across someone tagging maxpeed=NSL yesterday. If it gives 
someone happiness, fine, but I don't really think it should be necessary 
to tag the default situation, only when there is an exception to the 
general rule.

David


On 04/06/2009 10:49, Dave Stubbs wrote:
> 2009/6/4 Peter Miller :
>> I have been looking at the coverage of maxspeed limit data for highways in
>> the UK and we seem to have a right mix of styles.
>> Here is the data for bug chunk of England while avoiding including anything
>> from France or Ireland (which would include km/hour figure). We current
>> have over 17,000 highway ways tagged with maxspeed and also 300 ways tagged
>> as 'maxspeed:mph'. You will notice that for 30 miles per hour we have 30,
> 
> 
> You're assuming that's not a 20mph limit expressed in rounded down kph.
> 
> 
>> 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808, 48.28032 and 48.28.
>> Any suggestion on what we should recommend for the UK? I guess the USA
>> should also be party to this discussion but they have far less population of
>> the maxspeed field (only 70 uses in the Bay area) so possibly we should come
>> to a view first.  Our options seem to be:-
>> maxspeed=30mph (the user should strip a trailing mph to find the value)
>> maxspeed=30   (leaving it for the user to realise that it is in the UK and
>> therefore imperial)
>> maxspeed=30 mph (the user should strip the last word if it is mph including
>> the space)
>> maxspeed:mph=30 (Easy for the user)
>> maxspeed=48.28 (with a defined precision) For metric use no work by the
>> user, for imperial use a look-up table is required or a conversion and
>> rounding
> 
> Meh. 30mph == 48.28032 ~ 48.28 ~ 48 (and is what the highway code says).
> Any of those as tags will do for most purposes. The only one I'd
> complain about is specifying a mph value without the unit because it's
> impossible to determine what was intended. km/h is common enough to be
> used as the default.
> Whitespace is trivial to remove.
> 
> FWIW highway code conversions are:
> 20mph = 32
> 30mph = 48
> 40mph = 64
> 50mph = 80
> 60mph = 96
> 70mph = 112
> 
> Dave
> 
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Dave Stubbs
2009/6/4 Peter Miller :
>
> I have been looking at the coverage of maxspeed limit data for highways in
> the UK and we seem to have a right mix of styles.
> Here is the data for bug chunk of England while avoiding including anything
> from France or Ireland (which would include km/hour figure). We current
> have over 17,000 highway ways tagged with maxspeed and also 300 ways tagged
> as 'maxspeed:mph'. You will notice that for 30 miles per hour we have 30,


You're assuming that's not a 20mph limit expressed in rounded down kph.


> 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808, 48.28032 and 48.28.
> Any suggestion on what we should recommend for the UK? I guess the USA
> should also be party to this discussion but they have far less population of
> the maxspeed field (only 70 uses in the Bay area) so possibly we should come
> to a view first.  Our options seem to be:-
> maxspeed=30mph (the user should strip a trailing mph to find the value)
> maxspeed=30   (leaving it for the user to realise that it is in the UK and
> therefore imperial)
> maxspeed=30 mph (the user should strip the last word if it is mph including
> the space)
> maxspeed:mph=30 (Easy for the user)
> maxspeed=48.28 (with a defined precision) For metric use no work by the
> user, for imperial use a look-up table is required or a conversion and
> rounding

Meh. 30mph == 48.28032 ~ 48.28 ~ 48 (and is what the highway code says).
Any of those as tags will do for most purposes. The only one I'd
complain about is specifying a mph value without the unit because it's
impossible to determine what was intended. km/h is common enough to be
used as the default.
Whitespace is trivial to remove.

FWIW highway code conversions are:
20mph = 32
30mph = 48
40mph = 64
50mph = 80
60mph = 96
70mph = 112

Dave

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Richard Mann
I'd vote for 30mph (no space), and locally (Oxford) we'll hopefully have
cause to be using maxspeed=20mph for quite a lot of residentials, quite
soon...

It should be the digits on the sign. There might be a case for a different
tag (maxspeedmph=30, say), but maxspeed=30mph is just as good.

Richard
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Chris Hill




I tag what I see.  I see 30
which implies 30mph, so I tag 30mph.  The units differentiate it from
km/h.  Another mapper in this area (East Yorkshire) has tagged
some in km/h with 2dp.  Ulf then went over all of these and stripped
the decimals off.  As I encounter them I change them to imperial units,
not because I like imperial units - I'm strongly in favour of SI units
- but because I tag what I see.  

Cheers, Chris

Peter Miller wrote:

  
  
  I have been looking at the coverage of maxspeed limit data for
highways in the UK and we seem to have a right mix of styles.
  
  
  Here is the data for bug chunk of England while avoiding
including anything from France or Ireland (which would include km/hour
figure). We current have over 17,000 highway ways tagged with maxspeed
and also 300 ways tagged as 'maxspeed:mph'. You will notice that for 30
miles per hour we have 30, 30mph, 30 mph, 48.2, 48.28,
 48.280, 48.27808, 48.28032 and 48.28.
  
  
  Any suggestion on what we should recommend for the UK? I guess
the USA should also be party to this discussion but they have far less
population of the maxspeed field (only 70 uses in the Bay area) so
possibly we should come to a view first.  Our options seem to be:-
  maxspeed=30mph (the user should strip a trailing mph to find the
value)
  maxspeed=30   (leaving it for the user to realise that it is in
the UK and therefore imperial)
  maxspeed=30 mph (the user should strip the last word if it is
mph including the space)
  maxspeed:mph=30 (Easy for the user)
  maxspeed=48.28 (with a defined precision) For metric use no work
by the user, for imperial use a look-up table is required or a
conversion and rounding
  
  
  
  
  Here is what we have at the moment for 'Mid England' including
London, Portsmouth, Bristol, B'ham up to Liverpool, Manchester and
Leeds etc) starting with the most popular:-
  
  
  
  30mph 5185
  48.000 4155
  20mph 1282
  64.000 922
  32.000 871
  40mph 833
  96.000 383
  30.000 341
  80.000 300
  112.000 294
  30 mph 263
  60mph 245
  50mph 244
  50.000 164
  20 mph 160
  48.2803200 144
  48.280 97
  40 mph 95
  48.2780800 75
  24.000 69
  64.370 67
  16.000 67
  60.000 60
  113.000 58
  40.000 54
  100.000 43
  8.000 41
  50 mph 40
  97.000 39
  national 35
  80.4672000 32
  20.000 31
  64.3737600 29
  70mph 27
  10 mph 23
  5mph 20
  10.000 20
  10mph 18
  70 mph 18
  5 mph 15
  15mph 14
  110.000 11
  80.500 11
  32.180 10
  nsl 9
  36.000 9
  60 mph 8
  45.000 6
  15.000 6
  NSL 6
  32.1868800 6
  19.000 5
  7.000 5
  64.400 4
  11.200 3
  42.000 3
  15 mph 3
  5.000 3
  48.280 3
  12.800 2
  70.000 2
  96.5606400 2
  160.000 2
  30mph..change me! 1
  80; 50mph; 80 1
  32.187 1
  Carr Lane 1
  112.6540800 1
  38.000 1
  48;96 1
  32.200 1
  48;64;80 1
  8.050 1
  54.400 1
  48.300 1
  48.200 1
  16.090 1
  12.000 1
  
  
  
  
  
  Regards,
  
  
  
  
  Peter
  
  
  
  
  
  
  

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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Paul Jaggard
Hi

I think the principle of keeping it easy for the mapper should apply.  In
the UK, speeds are signed in mph, and most mappers will think in mph, so
let's record speeds in mph.  Anything else leads to confusion, conversions,
varying degrees of accuracy.  But to my mind, the worst result is the
inability to spot errors.

For example, a stretch of ring road near me has various speed limits at
various sections.  I could tell you it's 50mph for the first bit, 30mph at
the roundabout, then 70mph beyond.  But when I looked at it recently,
different bits were marked up with a whole jumble of numbers (including 112
on one side of the dual carriageway, 113 on the other).  Yes, I can convert
from km/h to mph and back again, but not in a quick glance.

When I map in France, I tag in km/h (just using a bare number), but in the
UK I absolutely want to tag in mph.

>From a data consumer's point of view, it's not hard to take any fields with
mph at the end and preprocessing or converting on the fly, as long as
there's consistency in using an 'mph' suffix.  Seeing as there are more bare
numbers that are obviously km/h than mph, saying a bare number in the UK
should be interpreted as mph is asking for trouble, I think.

So, I think maxspeed=30mph or maxspeed=48 should both be acceptable and
equivalent, but maxspeed=30mph preferred in the UK.  maxspeed=30 should NOT
be used.

One word of caution when looking at the tag usage in the UK - I've had
swathes of my maxspeed tagging changed from mph to km/h by users (or their
bots) in Germany and elsewhere, so beware using the current usage list as a
measure how UK mappers want to tag.

Keep it simple for the mapper and tag what's on the signs, and use an mph
suffix to avoid confusion.

Paul
(southglos)
 
-Original Message-
Date: Thu, 4 Jun 2009 08:45:20 +0100
From: Peter Miller 
Subject: [Talk-GB] maxspeed field - what units should we use. etc

I have been looking at the coverage of maxspeed limit data for  
highways in the UK and we seem to have a right mix of styles.

Here is the data for bug chunk of England while avoiding including  
anything from France or Ireland (which would include km/hour figure).  
We current have over 17,000 highway ways tagged with maxspeed and also  
300 ways tagged as 'maxspeed:mph'. You will notice that for 30 miles  
per hour we have 30, 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808,  
48.28032 and 48.28.

Any suggestion on what we should recommend for the UK? I guess the USA  
should also be party to this discussion but they have far less  
population of the maxspeed field (only 70 uses in the Bay area) so  
possibly we should come to a view first.  Our options seem to be:-
maxspeed=30mph (the user should strip a trailing mph to find the value)
maxspeed=30   (leaving it for the user to realise that it is in the UK  
and therefore imperial)
maxspeed=30 mph (the user should strip the last word if it is mph  
including the space)
maxspeed:mph=30 (Easy for the user)
maxspeed=48.28 (with a defined precision) For metric use no work by  
the user, for imperial use a look-up table is required or a conversion  
and rounding



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[Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Kevin Peat
I think we should tag what's on the signs ie. mph, as a conversion to kmh is
error prone even without the rounding issues.  I've tagged my local roads as
maxspeed=20mph|30mph|etc

Any application parsing maxspeed values needs to validate the data anyway
because like all our data the field could contain anything so checking for
mph as a suffix is hardly a big deal.

Kevin








On Thu, Jun 4, 2009 at 8:45 AM, Peter Miller wrote:

>
> I have been looking at the coverage of maxspeed limit data for highways in
> the UK and we seem to have a right mix of styles.
>
> Here is the data for bug chunk of England while avoiding including anything
> from France or Ireland (which would include km/hour figure). We current
> have over 17,000 highway ways tagged with maxspeed and also 300 ways tagged
> as 'maxspeed:mph'. You will notice that for 30 miles per hour we have 30,
> 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808, 48.28032 and 48.28.
>
> Any suggestion on what we should recommend for the UK? I guess the USA
> should also be party to this discussion but they have far less population of
> the maxspeed field (only 70 uses in the Bay area) so possibly we should come
> to a view first.  Our options seem to be:-
> maxspeed=30mph (the user should strip a trailing mph to find the value)
> maxspeed=30   (leaving it for the user to realise that it is in the UK and
> therefore imperial)
> maxspeed=30 mph (the user should strip the last word if it is mph including
> the space)
> maxspeed:mph=30 (Easy for the user)
> maxspeed=48.28 (with a defined precision) For metric use no work by the
> user, for imperial use a look-up table is required or a conversion and
> rounding
>
>
> Here is what we have at the moment for 'Mid England' including London,
> Portsmouth, Bristol, B'ham up to Liverpool, Manchester and Leeds etc)
> starting with the most popular:-
>
> 30mph 5185
> 48.000 4155
> 20mph 1282
> 64.000 922
> 32.000 871
> 40mph 833
> 96.000 383
> 30.000 341
> 80.000 300
> 112.000 294
> 30 mph 263
> 60mph 245
> 50mph 244
> 50.000 164
> 20 mph 160
> 48.2803200 144
> 48.280 97
> 40 mph 95
> 48.2780800 75
> 24.000 69
> 64.370 67
> 16.000 67
> 60.000 60
> 113.000 58
> 40.000 54
> 100.000 43
> 8.000 41
> 50 mph 40
> 97.000 39
> national 35
> 80.4672000 32
> 20.000 31
> 64.3737600 29
> 70mph 27
> 10 mph 23
> 5mph 20
> 10.000 20
> 10mph 18
> 70 mph 18
> 5 mph 15
> 15mph 14
> 110.000 11
> 80.500 11
> 32.180 10
> nsl 9
> 36.000 9
> 60 mph 8
> 45.000 6
> 15.000 6
> NSL 6
> 32.1868800 6
> 19.000 5
> 7.000 5
> 64.400 4
> 11.200 3
> 42.000 3
> 15 mph 3
> 5.000 3
> 48.280 3
> 12.800 2
> 70.000 2
> 96.5606400 2
> 160.000 2
> 30mph..change me! 1
> 80; 50mph; 80 1
> 32.187 1
> Carr Lane 1
> 112.6540800 1
> 38.000 1
> 48;96 1
> 32.200 1
> 48;64;80 1
> 8.050 1
> 54.400 1
> 48.300 1
> 48.200 1
> 16.090 1
> 12.000 1
>
> Regards,
>
>
> Peter
>
>
>
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Re: [Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Ed Loach
Peter wrote:

> Any suggestion on what we should recommend for the UK? 

Either of:
maxspeed=30mph (the user should strip a trailing mph to find the
value)
maxspeed=30 mph (the user should strip the last word if it is mph
including the space)

The maplint validation uses a regular expression which validates
either as OK.

But:
maxspeed=48.28 (with a defined precision) For metric use no work by
the user, for imperial use a look-up table is required or a
conversion and rounding
No. As you can see there are so many arbitrary conversions in the
figures you quoted and the best to use would be those signposted for
foreign drivers at ports (which round to 5km/h, downwards I think).
I think those are also in the highway code somewhere. But if we did
this you wouldn't know whether maxspeed=50 was for mph or km/h.

The wiki page for the maxspeed tag says (or did the last time I
looked) that the default units are km/h, but other units should be
stated explicitly. It used to say it had to be a number in km/h
which has led to the mess of tagging in the UK which was ignored by
the majority anyway (perhaps they don't read the wiki?) and added
mph anyway.

I'll admit that I also sometimes use maxspeed=national as there was
some talk of the government redefining these limits from their
current 70/60/30 values to reduce road fatalities, and if that were
to happen I'd hate to have to go around trying to find out which
roads tagged as 60 needed changing to 50. I didn't realise others
were using variations on NSL/nsl

I'll confess now that I helped with the maplint validation changes
to support the already widely used mph suffix. I think the imperial
heights/widths/lengths of 12'0" format is still an ongoing task
(since last October), as it doesn't fall into the "Number with
optional Unit" standard test format of a number followed by one of a
list of units. Map Features links the "NumWithUnit" types (currently
lengths/widths/heights/speeds) to this page:
http://wiki.openstreetmap.org/wiki/Map_Features/Units

Ed



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[Talk-GB] maxspeed field - what units should we use. etc

2009-06-04 Thread Peter Miller


I have been looking at the coverage of maxspeed limit data for  
highways in the UK and we seem to have a right mix of styles.


Here is the data for bug chunk of England while avoiding including  
anything from France or Ireland (which would include km/hour figure).  
We current have over 17,000 highway ways tagged with maxspeed and also  
300 ways tagged as 'maxspeed:mph'. You will notice that for 30 miles  
per hour we have 30, 30mph, 30 mph, 48.2, 48.28,  48.280, 48.27808,  
48.28032 and 48.28.


Any suggestion on what we should recommend for the UK? I guess the USA  
should also be party to this discussion but they have far less  
population of the maxspeed field (only 70 uses in the Bay area) so  
possibly we should come to a view first.  Our options seem to be:-

maxspeed=30mph (the user should strip a trailing mph to find the value)
maxspeed=30   (leaving it for the user to realise that it is in the UK  
and therefore imperial)
maxspeed=30 mph (the user should strip the last word if it is mph  
including the space)

maxspeed:mph=30 (Easy for the user)
maxspeed=48.28 (with a defined precision) For metric use no work by  
the user, for imperial use a look-up table is required or a conversion  
and rounding



Here is what we have at the moment for 'Mid England' including London,  
Portsmouth, Bristol, B'ham up to Liverpool, Manchester and Leeds etc)  
starting with the most popular:-


30mph   5185
48.000  4155
20mph   1282
64.000  922
32.000  871
40mph   833
96.000  383
30.000  341
80.000  300
112.000 294
30 mph  263
60mph   245
50mph   244
50.000  164
20 mph  160
48.2803200  144
48.280  97
40 mph  95
48.2780800  75
24.000  69
64.370  67
16.000  67
60.000  60
113.000 58
40.000  54
100.000 43
8.000   41
50 mph  40
97.000  39
national35
80.4672000  32
20.000  31
64.3737600  29
70mph   27
10 mph  23
5mph20
10.000  20
10mph   18
70 mph  18
5 mph   15
15mph   14
110.000 11
80.500  11
32.180  10
nsl 9
36.000  9
60 mph  8
45.000  6
15.000  6
NSL 6
32.1868800  6
19.000  5
7.000   5
64.400  4
11.200  3
42.000  3
15 mph  3
5.000   3
48.280  3
12.800  2
70.000  2
96.5606400  2
160.000 2
30mph..change me!   1
80; 50mph; 80   1
32.187  1
Carr Lane   1
112.6540800 1
38.000  1
48;96   1
32.200  1
48;64;801
8.050   1
54.400  1
48.300  1
48.200  1
16.090  1
12.000  1

Regards,


Peter


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