[OSM-talk-be] more stats: data density in the Belgian regions

[Glenn Plas]

Hi,

Last touched says nothing imho.  What does that really mean?  If you
want to monitor an area for (auditing) changes use :

http://zverik.osm.rambler.ru/whodidit/

in combination with OSM history viewer.

http://osmhv.openstreetmap.de/index.jsp

You cannot measure contributions in this way.  Some are small but hard
work, some are large but easy.

Just like the number of edits it says nothing and drawing conclusions
from it is futile and leads to empty conclusions.

The map will never be complete anyway, it's a dynamic thing.

Glenn




On 17-11-15 07:18, joost schouppe wrote:
> Marc,
> 
> I was thinking about your "similar mappers" idea. of course, you can
> make this very complicated (create a dataset of actions by users, then
> let loose a similarity algorithm). However, it can also be very simple.
> For example, using this [1] Overpass Turbo query, you can  get the
> usernames of all the mappers who last touched a historic=monument thing.
> It wouldn't be very hard to do this for a larger area and aggregate by
> user, so as to see who thee bigger contributors are. It is a crude
> measure, but it's just to get a list of people whose work you might want
> to check out, so I think it would do.
> You might want to download without the geometry and without first
> loading in your browser when checking larger areas or wider queries.
> 
> [1] http://overpass-turbo.eu/s/cMm
> 
> 2015-11-10 17:31 GMT+01:00 Marc Gemis <marc.gemis at gmail.com
> <mailto:marc.gemis at gmail.com>>:
> 
> 
> 
>     On Tue, Nov 10, 2015 at 8:17 AM, joost schouppe
>     <joost.schouppe at gmail.com <mailto:joost.schouppe at gmail.com>> wrote:
> 
> 
>         As to the thing you want to do with similar mappers: does it
>         have to be a history file? I'm not sure, and if it isn't, it's
>         probably easier to do it on a snapshot. That would make regular
>         updating also easier.
> 
> 
>     On a snapshot is fine. No need to find who was mapping the same as me. 
> 
> 
>      
> 
>         That said, I can release some of my intermediate files as tables
>         or csv, someone might be able to make some kind of website out
>         of that. But that would again be with a local scope, as I don't
>         have the capacity to process global files at once. (I cut up the
>         world in little pieces to run analysis, but that means you need
>         to finish a processing script before rolling it out, and I'm not
>         good at finishing things)
>         Some of the questions you asked have little to do with local
>         context, so it might be more interesting to see how a thing like
>         taginfo works and build upon that.
> 
> 
>      There national versions of taginfo for France and the UK. That is,
>     they only look at the tags in 1 country.
> 
>      I saw all my questions in local, Belgian context. E.g. is there
>     someone else mapping heritage buildings in Belgium, or am I the only
>     one ? If not, we could get in touch and exchange ideas specific for
>     Belgium. (or Flanders or ...)
> 
>      
> 
> 
>         My personal interest is more about "map completeness" for road
>         networks, landuse, amenities, etc; with a global scope. In the
>         second place mapper inequality and remote mapping. For things
>         like that, I don't see another approach than taking world
>         history and cutting it in pieces...
>          
> 
> 
>     Do you compare with an external source, or is something complete
>     when less mappers are mapping it now compared to "yesterday" ? 
> 
>     My first interest is what are we (the Belgian community) mapping
>     now. This is somehow related to your "map completeness", something
>     that is complete, will no longer be mapped. I'm looking forward to
>     see what you mean with complete :-)
> 
>     regards
> 
>     m
> 
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> 
> 
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