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

[Marc Gemis]

Thanks Joost,

It's always good to see such graphs. I'm interested to learn

* What are we mapping now ?
* What did we map in the past ?
* Who is mapping what  ?
* Who is mapping similar things as me ? (Or am I the only one mapping
feature X ? / can I ask someone also for help with feature X ?)
* Where are we mapping feature X (on town/village level) ?


With "what" I mean e.g. categories of features: streets (highway tags),
landuse/landcover, boundaries, buildings, shops, etc.
However, for some purposes categories might be broken. mapping
amenity=library or amenity=bench are quite different. The same holds for
tourism=hotel and tourism=information,information=board. The library and
hotel are "important" features, bench or an information board not so. I
know "important" is relative, but I hope you understand what I mean.

Of course this is harder when we start thinking about "attributes": turn
lanes, destinations, house numbers, or additional attributes for
amenity=bicycle_parking (such as covered or bicycle_parking=...), etc.

For the last two questions (mapping feature X) the ultimate goal would be
to answer questions such as "Who else is mapping bicycle_parkings ?" With
which attributes. ? Where is feature X not mapped at all ?

Regards

m


On Mon, Nov 9, 2015 at 8:59 AM, joost schouppe <joost.schouppe at gmail.com>
wrote:

> Hi all,
>
> So, Nicolas' remark after my last post got me interested again in some
> stats about OSM data in Belgium. Is there any difference between Brussels,
> Wallonia and Flanders?
> Of course, I made a little mistake and my laptop will have to redo some
> calculations this night, but here's something that worked.
>
> How did data density evolve in the three parts of the country over the
> last years?
>
> This is a simple count of nodes that were in existence on january first of
> any year. So that includes independent nodes, but also nodes used (and used
> again and again) for building lines and relations.
> To make the regions comparable, I standardized by population. The idea is
> that most stuff that we map is a function of humans, no so much of area.
> (Yes, I know, same population in a larger area would probably imply more
> things to map)
>
> So this graph shows the evolution of nodes per 1000 of population.
> Flanders was clearly highest since 2010. Wallonia started of much quicker
> than Brussels, but can't keep up with Flanders. In Brussels we have a very
> obvious jump in 2014. That's probably the buildings/addresses import.
>
> http://i.imgur.com/RPK38DM.jpg
>
>
> Next thing I want to do is see how many different mappers have built the
> map.
>
> I just stumbled upon the very first nodes and lines in Flanders, and the
> user is still active. The story of these nodes is in his diary, very bottom
> of the page: http://wiki.openstreetmap.org/wiki/User:LA2/Diary_for_Q3_2005
>
>
> --
> Joost @
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