Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Martin Wynne

On 14/11/2019 12:31, Ken Kilfedder wrote:

Per the wiki "Use waterway=canal for man-made open flow (free flow vs pipe flow) 
waterways used to carry useful water for transportation, hydro-power generation OR 
irrigation purposes."   E.g. there are a range of purposes for which waterway=canal 
is used.


But see: https://en.wikipedia.org/wiki/Aqueduct_(water_supply)

"An aqueduct is a watercourse constructed to carry water
...in modern engineering, the term aqueduct is used for any system of 
pipes, ditches, canals, tunnels, and other structures used for this purpose.

...The simplest aqueducts are small ditches cut into the earth"

Martin.

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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Colin Smale
On 2019-11-14 13:22, Martin Wynne wrote:

> "Canal" should surely be restricted to transport functions? Boating apps 
> presumably treat "canal" as a route unless navigation restrictions are added.

Canal indicates a form of construction - man-made. Unlike natural
watercourses they were constructed because someone had a purpose in
mind, which might have been anything... Transport (using boats/barges),
moving water about, decoration, powering watermills, providing a relief
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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Ken Kilfedder
Per the wiki "Use waterway=canal for man-made open flow (free flow vs pipe 
flow) waterways used to carry useful water for transportation, hydro-power 
generation OR irrigation purposes."   E.g. there are a range of purposes for 
which waterway=canal is used.

The access tags could be used to make it clear - access=no and/or boat=no.

---
https://hdyc.neis-one.org/?spiregrain
spiregrain_...@ksglp.org.uk

On Thu, 14 Nov 2019, at 12:22 PM, Martin Wynne wrote:
> "Canal" should surely be restricted to transport functions? Boating apps 
> presumably treat "canal" as a route unless navigation restrictions are 
> added.
> 
> If the stuff that is moving is the water rather than the boats, 
> "aqueduct" would be the correct term.
> 
> cheers,
> 
> Martin.
> 
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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Paul Berry
I pieced it together as best I could and came up with that, which reminds
me that we need much better (UK-specific) tagging information on the Wiki.

Nothing stopping anyone rolling their own tags though. I'd have gone for
man_made=leat which has some small precedent.

Regards,
*Paul*

On Thu, 14 Nov 2019 at 12:25, Dan S  wrote:

> I think instead of canal=headrace you meant to write usage=headrace?
> That's what's in the wiki, and also 1000+ entries seen in taginfo.
>
> I've chatted many times to people about millraces, but the term
> "headrace" (and "tailrace") is new to me. I'll add keywords to the
> wiki to make searching easier.
>
> Best
> Dan
>
> Op do 14 nov. 2019 om 11:53 schreef Paul Berry :
> >
> > Looking at the existing guidelines it would be waterway=canal and
> canal=headrace (canal here used in the power rather than transport context)
> >
> > If this is indeed correct then it's not very obvious but it is detailed
> here:
> https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies#Headraces
> >
> > Regards,
> > Paul
> >
> > On Thu, 14 Nov 2019 at 11:16, Charlie Reid  wrote:
> >>
> >> Hi
> >>
> >>
> >>
> >> Can find no guidance on the Wiki about tagging mill races. I come
> across these continually while surveying.
> >>
> >>
> >>
> >> They are a totally distinctive water feature which don’t bear much
> relation to listed waterway types. Drain seems to be the closes value – but
> this really misrepresents  their appearance, purpose and behaviour.
> >>
> >>
> >>
> >> Any thoughts
> >>
> >>
> >>
> >> Charlie Reid
> >>
> >>
> >>
> >>
> >>
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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Dan S
I think instead of canal=headrace you meant to write usage=headrace?
That's what's in the wiki, and also 1000+ entries seen in taginfo.

I've chatted many times to people about millraces, but the term
"headrace" (and "tailrace") is new to me. I'll add keywords to the
wiki to make searching easier.

Best
Dan

Op do 14 nov. 2019 om 11:53 schreef Paul Berry :
>
> Looking at the existing guidelines it would be waterway=canal and 
> canal=headrace (canal here used in the power rather than transport context)
>
> If this is indeed correct then it's not very obvious but it is detailed here: 
> https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies#Headraces
>
> Regards,
> Paul
>
> On Thu, 14 Nov 2019 at 11:16, Charlie Reid  wrote:
>>
>> Hi
>>
>>
>>
>> Can find no guidance on the Wiki about tagging mill races. I come across 
>> these continually while surveying.
>>
>>
>>
>> They are a totally distinctive water feature which don’t bear much relation 
>> to listed waterway types. Drain seems to be the closes value – but this 
>> really misrepresents  their appearance, purpose and behaviour.
>>
>>
>>
>> Any thoughts
>>
>>
>>
>> Charlie Reid
>>
>>
>>
>>
>>
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>> Talk-GB mailing list
>> Talk-GB@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-gb
>
> ___
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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Martin Wynne
"Canal" should surely be restricted to transport functions? Boating apps 
presumably treat "canal" as a route unless navigation restrictions are 
added.


If the stuff that is moving is the water rather than the boats, 
"aqueduct" would be the correct term.


cheers,

Martin.

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Re: [Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Paul Berry
Looking at the existing guidelines it would be waterway=canal and
canal=headrace (canal here used in the power rather than transport context)

If this is indeed correct then it's not very obvious but it is detailed
here:
https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies#Headraces

Regards,
*Paul*

On Thu, 14 Nov 2019 at 11:16, Charlie Reid  wrote:

> Hi
>
>
>
> Can find no guidance on the Wiki about tagging mill races. I come across
> these continually while surveying.
>
>
>
> They are a totally distinctive water feature which don’t bear much
> relation to listed waterway types. Drain seems to be the closes value – but
> this really misrepresents  their appearance, purpose and behaviour.
>
>
>
> Any thoughts
>
>
>
> Charlie Reid
>
>
>
>
> ___
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[Talk-GB] Tagging Mill Races / Leats / Lades

2019-11-14 Thread Charlie Reid
Hi

Can find no guidance on the Wiki about tagging mill races. I come across these 
continually while surveying.

They are a totally distinctive water feature which don't bear much relation to 
listed waterway types. Drain seems to be the closes value - but this really 
misrepresents  their appearance, purpose and behaviour.

Any thoughts

Charlie Reid


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