Re: [Tagging] How to tag a public works facility ?

[Martin Koppenhoefer]

2014-02-21 14:22 GMT+01:00 Erik Johansson :

> I have now tagged such an area with
>
> landuse=depot
> barrier=fence
> depot=public_works
> (access=private maybe?)
>
> ok? (atm all on the same way)
>
>
>


I believe using the same geometry as line and as polygon at the same time
on the same object is a little bit problematic. Barrier=fence is supposed
to be a linear feature, while landuse and depot are probably areas. I'd
rather use a multipolygon for the latter and leave just the linear tags on
the way.

cheers,
Martin
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Re: [Tagging] How to tag a public works facility ?

[Erik Johansson]

On Sat, Feb 22, 2014 at 11:51 AM, Martin Koppenhoefer
 wrote:
> 2014-02-21 14:22 GMT+01:00 Erik Johansson :
>
>> I have now tagged such an area with
>>
>> landuse=depot
>> barrier=fence
>> depot=public_works
>> (access=private maybe?)
>>
>> ok? (atm all on the same way)
>>
>>
>
>
>
> I believe using the same geometry as line and as polygon at the same time on
> the same object is a little bit problematic. Barrier=fence is supposed to be
> a linear feature, while landuse and depot are probably areas. I'd rather use
> a multipolygon for the latter and leave just the linear tags on the way.


I've thought about it a bit, and now I know I see it more as a
fence=yes tag on the main tag, I won't draw the geometry for the
fence, it's not worth it. But I got some flak from Dee on this as
well. So obviously there are lots of people who think it's bad doing
this.

So I guess the final say is how this is handled by the tools that use
the . If they can handle stuff like this with ease, then I see no
reason to  duplicate a way just to add a fence, or making it over
complicated by letting two ways share nodes or a multipolygon from
multipleways..

I consider over zealous use of multipolygons and node sharing harmfull for OSM.

-- 
/emj

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Re: [Tagging] How to tag a public works facility ?

[Martin Koppenhoefer]

2014-02-22 13:49 GMT+01:00 Erik Johansson :

> So I guess the final say is how this is handled by the tools that use
> the . If they can handle stuff like this with ease, then I see no
> reason to  duplicate a way just to add a fence, or making it over
> complicated by letting two ways share nodes or a multipolygon from
> multipleways..
>


I see this not as a case for tools to handle something, but as a question
how to model in a clear way. If you now add height=2m to this object, you
might still be able to say, "this is for the fence" by interpreting it, but
adding other tags like wikipedia or name it will become often unclear to
which object the attributes / tags belong, if several different objects are
represented in the same osm object. If we had a distinct area datatype this
would be more obvious (and less a problem therefore, because people would
be forced to separate objects).
E.g. if your fence were a wall, it would be impossible to tell whether this
was a thick wall (mapped as an area) or if the wall was intended as a
linear feature.

cheers,
Martin
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Re: [Tagging] Feature Proposal - RFC - All You Can Eat

[Paul Johnson]

On Monday, February 17, 2014, Steve Doerr  wrote:

> On 17/02/2014 18:04, Fernando Trebien wrote:
>
>  I still think that "opening_hours" as a subtag would be an unnecessary
>> specialization that would only be needed rarely. Can you provide an
>> example in which you would not be able to represent that information
>> in a different way? (such as using two or more geometric objects)
>>
>
> It's quite common in the UK for a restaurant to operate as a normal, a la
> carte restaurant most of the week, and offer an all-you-can-eat buffet on,
> say, Sundays. I'm at a loss to understand why that would be represented as
> two separate geometric objects.
>

Yeah, I've been trying to think of a use case scenario that makes sense for
this, and I can't.  It seems to be more in line with the expectation
typical by cuisine.  For instance, Genghis
Grillseems to be about the only chain
around that
*doesn't* consider Mongolian.
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