[OSM-talk-be] more stats: data density in the Belgian regions
Glenn Plas
glenn at byte-consult.be
Tue Nov 17 11:22:36 UTC 2015
Hi Joost,
I get your point, I was kind of cherry picking a small part of the
discussion. I was thinking about the same in the back of my mind,
trying to find users that 'do the same'. In my case that would probably
be postal code (AGIV) work ... lately. I tend to move on as well in my
work. I used to be into putting buildings on the map.
I find it easier to monitor an area and then analysing changeset that
the rss feeds shows me. You'll be surprised how much crap you find. In
my case half of them are from Marc, which I kind of skip.. since I know
what work he delivers I just glance over them. But some are worth fixing...
On the subject of analyses (centered around last touched), those are plenty.
So with a detour, I kind of did answer 'how do I find mappers with
similar interests?' . For me that is simple: they are geographically
close the my area's of interest, which are spread over a number of
locations.
You might want to start to read from this page :
http://wiki.openstreetmap.org/wiki/User_Studies ( and the links)
http://www.cs.nuim.ie/~pmooney/OSM-CAT/
There are more of those user analysis docs scattered all over the wiki.
Make sure you're not re-inventing the wheel here. You're probably aware
of this url as well (sure Marc is) http://hdyc.neis-one.org/
It's not easy but I love to help analysing the data, I've done this for
about 8 years now, it's fascinating.
Glenn
On 17-11-15 08:38, joost schouppe wrote:
> Glenn,
>
> You are saying this doesn't solve a problem which we weren't trying to
> solve.
>
> My mail was a response on Marc about how you could find mappers with
> similar interests as yourself. So the suggestion was to take some
> tagging you use often, and see who has an interest in these things. Yes,
> it would be nice to see who actually created these things in the first
> place, but as a crude measure it might be worth exploring.
>
>
> 2015-11-17 9:11 GMT+01:00 Glenn Plas <glenn at byte-consult.be
> <mailto:glenn at byte-consult.be>>:
>
> 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>
> > <mailto: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>
> <mailto: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
> >
> > _______________________________________________
> > Talk-be mailing list
> > Talk-be at openstreetmap.org <mailto:Talk-be at openstreetmap.org>
> <mailto:Talk-be at openstreetmap.org <mailto:Talk-be at openstreetmap.org>>
> > https://lists.openstreetmap.org/listinfo/talk-be
> >
> >
> >
> >
> > --
> > Joost @
> > Openstreetmap
> > <http://www.openstreetmap.org/user/joost%20schouppe/> | Twitter
> > <https://twitter.com/joostjakob> | LinkedIn
> > <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup
> > <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/> |
> Reddit
> > <https://www.reddit.com/u/joostjakob> | Wordpress
> > <https://joostschouppe.wordpress.com/>
> >
> >
> > _______________________________________________
> > Talk-be mailing list
> > Talk-be at openstreetmap.org <mailto:Talk-be at openstreetmap.org>
> > https://lists.openstreetmap.org/listinfo/talk-be
> >
>
>
> _______________________________________________
> Talk-be mailing list
> Talk-be at openstreetmap.org <mailto:Talk-be at openstreetmap.org>
> https://lists.openstreetmap.org/listinfo/talk-be
>
>
>
>
> --
> Joost @
> Openstreetmap
> <http://www.openstreetmap.org/user/joost%20schouppe/> | Twitter
> <https://twitter.com/joostjakob> | LinkedIn
> <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup
> <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/> | Reddit
> <https://www.reddit.com/u/joostjakob> | Wordpress
> <https://joostschouppe.wordpress.com/>
More information about the Talk-be
mailing list