[Tagging] Tagging method of amenities at camp_sites

[David Bannon]

On Fri, 2015-03-27 at 14:07 +0000, Jan van Bekkum wrote:
> It is a bit of a philosophical question: do you prefer a placeholder
> or a polygon of which you don't know how correct it is, for example a
> forest behind the campsite that may or may not be part of the
> campground.

In natural surroundings, a place holder node is the lesser of two evils.
To mark an arbitrary poly implies camping within is somehow better than
outside. And that is totally misleading.

But a single node cannot carry the #4 model associating different
features or constraints. So a very little polygon ? One that implies its
a 'pitch' rather than a campground ? It says "I camped right here".

David
> 
> 
> On Fri, Mar 27, 2015 at 1:57 PM Marc Gemis <marc.gemis at gmail.com>
> wrote:
>         In many cases you will be able to determine the area from the
>         aerial images (thinking of Western European campsites).
>         I assume that in the campsites you visited, the actual area
>         was rather fuzzy and that the exact area will never been
>         known, not ? OSM has no solution for fuzzy areas anyhow.
>         
>         
>         Is it difficult to obtain an approximation of the area when
>         you already go through the effort to position all the
>         amenities as individual nodes ?
>         you can always leave a note or fixme tag to indicate that the
>         shape has to be established.
>         
>         
>         just my .5 cents
>         
>         
>         regards
>         
>         
>         m
>         
>         On Fri, Mar 27, 2015 at 12:37 PM, Jan van Bekkum
>         <jan.vanbekkum at gmail.com> wrote:
>                 So if you don't know the real shape of the polygon it
>                 would be best to create a placeholder polygon (like a
>                 circle - it will be clear that it is a placeholder)
>                 and put all amenities inside it until the real shape
>                 is known.
>                 
>                 
>                 On Fri, Mar 27, 2015 at 10:33 AM Marc Gemis
>                 <marc.gemis at gmail.com> wrote:
>                 
>                         Overpass understands this. When I look for all
>                         toilets in the "Zoo Antwerpen" with [1], I
>                         only find toilets in that Zoo
>                         
>                         
>                         regards
>                         
>                         
>                         m
>                         
>                         
>                         [1] http://overpass-turbo.eu/s/8qL
>                         
>                         On Fri, Mar 27, 2015 at 10:24 AM, Marc Gemis
>                         <marc.gemis at gmail.com> wrote:
>                                         
>                                         OK, I did not know that !  Is
>                                         this "is-in-polygon" test
>                                         something that
>                                         is already being done ?
>                                         Examples ?
>                                 
>                                 
>                                 Nominatim that adds the address of the
>                                 building to the POI is an example of a
>                                 similar test / algorithm. 
>                                 Sorry, don't know any other examples.
>                                 But it just makes sense that you do
>                                 not have to define inclusion of
>                                 something when you can determine that
>                                 from it's position.
>                                 
>                                 
>                                 I also only know 1 website that
>                                 supports the site relation, the
>                                 geschichtskarte for historical items
>                                 
>                                 
>                                 regards
>                                 
>                                 
>                                 m
>                                 
>                                 
>                         
>                         
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