[OSM-talk] Activity statistics per city (or region)

[Pierre Béland]

My OSMPlanetStats script provides profile statistics of a Planet File or simple an Overpass Query output. This provides number of relations, ways and nodes classified with the main tag of the objects (the feature that it represent such as higway, building, amenity, etc). It also provide distance statistics (km of highways).  If you dig in the results, you can then see Distance stats for roads classified by the type of road.

Note that the script actually only accept as input an osm.bz2 file. The csv output file let's analyze the result in a spreadsheet. 

see https://github.com/pierzen/OsmPlanetStats
  
Pierre 

      De : joost schouppe <joost.schouppe at gmail.com>
 À : César Martínez Izquierdo <cesar.izq at gmail.com> 
Cc : OSM Talk <talk at openstreetmap.org> 
 Envoyé le : Lundi 26 octobre 2015 11h46
 Objet : Re: [OSM-talk] Activity statistics per city (or region)
   
Cesar,
If you are interested in road network completeness, you need road network length evolution. You can tell a network is getting completed as the network length levels out. An example in relatively complete Flanders:As you can see here: http://i.imgur.com/2hxAXNk.gif main roads and minor roads (unclassified, residential) near completion, but slow roads and other roads keep growing.As you say, recency only really becomes an issue for a road network once it has been completed. So only when total length has been relatively flat for a while, do you really need to look at this too.
With the OSM history importer and some SQL query you can get these length statistics out of the data.
Of course, as the road network comes of age, a lot of extra info gets tagged, like turn restrictions (these are relations, so harder to get evolution), pedestrian crossings, traffic, lights, etc.




2015-10-26 10:52 GMT+01:00 César Martínez Izquierdo <cesar.izq at gmail.com>:



On 26 October 2015 at 10:28, Mateusz Konieczny <matkoniecz at gmail.com> wrote:
> "provides access to existing users" - I am not sure what you want. Who
> was last to edit given element? List of all user accounts? List of users
> active in a given region? Something else?

I mean for instance list of all users and its declared location
(assuming that this is a poor indicator: we tend to sometimes edit in
remote places, declared location may be outdated, etc).

> Also - counting all nodes will give poor result. Place with massive
> amount of outdated data with dead community that used to be active will
> score highly. Place with new, highly active community will score
> poorly. At least, one should count only new/recently modified
> ways/nodes/elements.

Total nodes may be a good indicator for completeness, while recent
nodes may be useful for assessing the activity of the community. I am
interested on both indicators.

On the other hand, I believe recent nodes may be a misleading
indicator on regions where the DB is quite complete (I am interested
specifically about highway=*) and there is little urbanization
activity. Of course, there is always some corrections to do on any
area, but probably they are statistically negligible compared with a
region which still has lot of unmapped roads.

César



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   César Martínez Izquierdo
   GIS developer
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   Universitat Autònoma de Barcelona (SPAIN)
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