[Tagging] `amenity=shelter` implies `building=yes`?

[Warin]

On 17/06/18 18:36, Michael Reichert wrote:
> Hi Bryan,
>
> Am 17.06.2018 um 06:45 schrieb Bryan Housel:
>> Does `amenity=shelter` imply `building=yes`?
>>
>> The osm wiki page does not suggest `building=*` as a “tag to use in combination”
>> https://wiki.openstreetmap.org/wiki/Tag:amenity=shelter <https://wiki.openstreetmap.org/wiki/Tag:amenity=shelter>
>>
>> But most other features which are closed-way structures need the `building=*` tag.  I know it’s a tag used by 3D mapping.  It seems like for consistency, we should add an explicit `building=*` tag.
>>
>> Asking for https://github.com/openstreetmap/iD/issues/5084 <https://github.com/openstreetmap/iD/issues/5084>
> Please keep in mind that there are not only shelters in the countryside
> and the mountains but also at thousands of bus stops. While shelters for
> hiking usually look like small buildings, shelters at bus stops don't.

There are also picnic shelters .. here they can have no walls just a 
roof to shelter from the heat of the sun or the occasional bit of rain.
e.g. 
https://www.riversideca.gov/park_rec/sites/riversideca.gov.park_rec/files/pictures/Picnic%20Shelter%20Hunter%20hobby.JPG


>
> The following three are no buildings from my point of view because they
> have one wall only. Either the two other walls do not fully stretch from
> the ground to the roof or the shelter itself can be removed easily.
>
> https://www.mapillary.com/app/?lat=49.08680549357706&lng=9.078079866007897&z=17&pKey=90pd5WuYg8zOk_L8dxLFFQ&focus=photo
>
> https://www.mapillary.com/app/?lat=49.08985722389377&lng=9.07931005221235&z=17&pKey=oXQHKqb3Lc3Ae9IXj-5PHw&focus=photo
>
> https://www.mapillary.com/app/?lat=49.10616167487336&lng=9.121348618135698&z=17&pKey=8xUGL_VKp45sOfd9VW7dUw&focus=photo
>
> There is building=roof but I would not use it for such shelters. They
> are not treated as buildings by the cadastre, why should I do? (If they
> are larger and have no walls, they
>
> I think that nobody of us knows the whole world and that's why I ask you
> not to decide on the default values of the whole world. If local mappers
> think that a shelter is a building, they will tag it as such. If they
> think that it does not qualify to be a building, they will not add the tag.
>
> Adding missing default tags is easier for data consumers than removing
> potentially wrong and superfluous default tags.
>
> Best regards
>
> Michael
>
>
>
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