Re: [Tagging] Mapping freeway stub ends?

[Martin Koppenhoefer]

sent from a phone

> On 25 Feb 2017, at 21:08, Paul Johnson  wrote:
> 
> I tend to favor highway=construction, construction=* and possibly 
> abandoned=yes if it's partially built and could be finished later, but it's 
> left in-situ


+1, I'd keep construction until the road is opened to the public (or abandoned 
if it's not supposed to be opened)

cheers,
Martin 
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Re: [Tagging] A place where letters & parcels are sent to be sorted so they can be delivered?

[John Willis]

> On Feb 25, 2017, at 11:33 PM, Philip Barnes  wrote:
> 
> I would imagine that is quite common in large towns and cities.

Yea - all the main sorting facilities I know of - 2 in the US and 3 in Japan 
are HUGE buildings with many employees routing mail for hundreds of thousands 
or millions of people. 

Then there is a little retail window on the front.  Often times this is the 
post office open the latest or has bulk mail acceptance (presort) - but the are 
often represented as a separate facility often times (signage wise) in the US 
and not in Japan - the "main" post office does regional sort and local sort and 
retail counter service. 

Javbw. 
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Re: [Tagging] Start of a river

[Dave Swarthout]

That's interesting. I wonder if the tagging of tourism=attraction is
totally appropriate but surely a waterway=source tag is. Presumably the
mapper was trying to indicate that the source of that stream is where that
node is.

I'm going to start using the tag myself and let data consumers figure it
out if they wish. After a while I'll consider adding it to the Wiki. There
are a few instances of the tag in use already.

On Feb 26, 2017 2:23 PM, "Martin Koppenhoefer" 
wrote:

> here's a major German river which is fed by 2 rivers: http://www.
> openstreetmap.org/relation/412876#map=15/50.0864/11.3986
>
>
> The point where it starts doesn't (yet) have any meaningful tags, just a
> property disguised as a feature: http://www.openstreetmap.org/node/
> 135500355
>
> cheers,
> Martin
>
>
> sent from a phone
>
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Re: [Tagging] Mapping freeway stub ends?

[Bill Ricker]

... I have seen examples of stubs being constructed, end up as a ghost road
for the next 3 or 4 decades, then suddenly are a thing that exists.  I 5
opened in 1963 without ramps to I 84 east initially, but stubs existed.


Yes we had a similar ghost exit on I-93 above Charles town/Somerville just
north of Boston -- in mid-air even -- that was intended to connect the
never built inner-ring. Decades later, the new bridges and tunnels of The
Big Dig connected to the ghost exit. US-1is routed via the former ghosts
iirc.

 (Originally the through-road and inner-ring were to be I-95 and I-295 or
maybe 695, but with cancellation of inner-ring and the Boston to Dedham
Great Swamp I-95 segment and deferment of Peabody I-95 connection, the I-93
designation was extended and 95 went around the built ring. Which is why we
have a 495 but no 295 and why 95 does not go through Boston as it should.)
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Re: [Tagging] Start of a river

[Stephan Knauss]

how about extending the waterway relation with a member role which can 
indicate either the "spring" or the "source" in case of a "creation" of 
a river by multiple tributary rivers?


Not sure how it would best be called. Source? Origin? Confluence? Is 
there a specific hdyrology term for this?


Wikipedia might indicate that "source" is the right word to use.

https://en.wikipedia.org/wiki/Confluence

https://en.wikipedia.org/wiki/River_source

If this is also suitable for a spring, then changing the role spring to 
source would do the trick.


https://wiki.openstreetmap.org/wiki/Relation:waterway

While you update the wiki: I feel the "tributary" role also deserves to 
be documented in the wiki page. It is used nearly 7.000 times.


Stephan


On 26.02.2017 09:41, Dave Swarthout wrote:

That's interesting. I wonder if the tagging of tourism=attraction is
totally appropriate but surely a waterway=source tag is. Presumably the
mapper was trying to indicate that the source of that stream is where
that node is.

I'm going to start using the tag myself and let data consumers figure it
out if they wish. After a while I'll consider adding it to the Wiki.
There are a few instances of the tag in use already.

On Feb 26, 2017 2:23 PM, "Martin Koppenhoefer" mailto:dieterdre...@gmail.com>> wrote:
The point where it starts doesn't (yet) have any meaningful tags,
just a property disguised as a
feature: http://www.openstreetmap.org/node/135500355



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Re: [Tagging] Start of a river

[Dave Swarthout]

Stephan's reference to Wikipedia helps to properly define source in
this context :

Wikipedia: confluence: In geography, a confluence is the meeting of two or
more bodies of water. Also known as a conflux, it refers either to the
point where a tributary joins a larger river, (main stem), or *where two
streams meet to become the source of a river of a new name*, such as the
confluence of the Monongahela and Allegheny rivers in Pittsburgh,
Pennsylvania creating the Ohio River.

The point of confluence isn't a "source" in the normal sense (that is
usually a spring, glacier or pond)  but it does indicate the beginning of a
new named river and as such, justifies special treatment IMO. In the
situation where that beginning point is a spring the two tags one might
use, waterway=source and natural=spring, do not interfere with one another.

The other Wikipedia article about River_source favors using the source of
the named river's longest tributary as its source, so it disagrees with the
first article. In practice, an ordinary OSM user probably will not usually
be able to determine such a source point unless he or she happens to be in
the field with map and measuring tape.

I think waterway=source is a good candidate for inclusion in the OSM Wiki
but I'm not anxious to add it. Editing that blasted Wiki is so difficult I
usually avoid it at all costs. The waterway page looks easily editable so
perhaps I'll give it a try if we are all in agreement that such an
addition makes sense. The Relation:waterway page uses a table. No way I'm
going near that page LOL

I know it's difficult to find consensus on this list, or anywhere for that
matter, so I'll wait until all the comments are in before going ahead with
any change to the Wiki.

Thanks,

Dave

On Sun, Feb 26, 2017 at 11:04 PM, Stephan Knauss 
wrote:

>
> how about extending the waterway relation with a member role which can
> indicate either the "spring" or the "source" in case of a "creation" of a
> river by multiple tributary rivers?
>
> Not sure how it would best be called. Source? Origin? Confluence? Is there
> a specific hdyrology term for this?
>
> Wikipedia might indicate that "source" is the right word to use.
>
> https://en.wikipedia.org/wiki/Confluence
>
> https://en.wikipedia.org/wiki/River_source
>
> If this is also suitable for a spring, then changing the role spring to
> source would do the trick.
>
> https://wiki.openstreetmap.org/wiki/Relation:waterway
>
> While you update the wiki: I feel the "tributary" role also deserves to be
> documented in the wiki page. It is used nearly 7.000 times.
>
> Stephan
>
>
> On 26.02.2017 09:41, Dave Swarthout wrote:
>
>> That's interesting. I wonder if the tagging of tourism=attraction is
>> totally appropriate but surely a waterway=source tag is. Presumably the
>> mapper was trying to indicate that the source of that stream is where
>> that node is.
>>
>> I'm going to start using the tag myself and let data consumers figure it
>> out if they wish. After a while I'll consider adding it to the Wiki.
>> There are a few instances of the tag in use already.
>>
>> On Feb 26, 2017 2:23 PM, "Martin Koppenhoefer" > > wrote:
>> The point where it starts doesn't (yet) have any meaningful tags,
>> just a property disguised as a
>> feature: http://www.openstreetmap.org/node/135500355
>>
>
>
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-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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