[OSM-talk] proposed mechanical edit - moving building=building to building=yes

[Christoph Hormann]

On Saturday 09 June 2018, Michael Reichert wrote:
>
> Did you investigate who used that tag and maybe why? Was it a bot, a
> editor preset, an import or manual user input? I would like to have
> this question answered before a mechanical edit.

I had looked at this after Mateusz's announcement and it seems fairly 
broad in origin:

* Both iD and JOSM
* mostly manual mapping
* a large portion seems from HOT mapping in southern Africa and 
Bangladesch (probably about half) so it might be a good idea for HOT to 
look into improving education of their mappers in proper use of 
building tags and diligence and exactness in entering tags.
* occurrences look fairly scattered in most cases so it seems this is 
rarely mappers always using the wrong tag.

By the way - do editors, in particular JOSM validator of course, detect 
tagging mistakes of this kind in some form?  This is a slippery slope 
because you easily end up with the condescending Google style 'did you 
mean to search for Y instead of X?'.  But things like:

* key and value identical
* single character variation of a common tag with no significant use on 
its own
* mixup of common keys like landuse/leisure, water/waterway etc.

are things that could be hinted cautiously to the user to be possible 
errors.  From JOSM i only know the message that a value is not in 
presets - which would catch these errors as well but which is not that 
meaningful.

-- 
Christoph Hormann
http://www.imagico.de/