[OSM-talk] Quality reports of non EU area

[Matthias Meisser]

Thanks for your work John!
I need to take a clother view if I have a bit more time for that.

Well I guess what Jaakko says is partly true. Mssive Data (see e.g. the
fat imports) doesn't show up how good (here lively) the quality of the
data is. thats why I personaly like OSMatrix as you can analyse
different quality indicators (buildings, allotments, last Edits,...).

My background for asking for non EU quality measurements is, that I try
to convince a bigger company on using OSM as GIS data source. Cause
their management is stated in the US I beliefe, that they aren't aware
on the actually quite good quality here in Europe :/

bye
Matthias


Am Dienstag, den 23.08.2011, 03:53 -0500 schrieb Jaakko Helleranta.com:
> Stupid(?) question:
> Does this merely look at data density in the given areas?
> 
> 
> My observation from nearly a year in Haiti says that I wouldn't draw
> any solid link between data quantity/density and quality. It may (or
> may not) seem that in general where there are active communities then
> OSM data is also of good quality and density can be seen as a general
> proxy(?) for map (database) quality but it's also clear that a lot of
> data can also simply mean a lot of crap.
> 
> 
> Cheers,
> -Jaakko
> 
> --
> jaakko at helleranta.com * Skype: jhelleranta * Mobile: +509-37-269154
>  *  http://go.hel.cc/MyProfile
> 
> On Tue, Aug 23, 2011 at 1:29 AM, John Harvey
> <john at johnharveyphoto.com> wrote:
>         I took a look at a bunch of cities around Europe, North
>         America and some of Asia.  I convert the OSM data into a
>         compressed vector form that scales pretty linearly with node
>         density, way density and POI metadata.  For these cities, I
>         try to fit as much city as I can into less than 20MB.  I use
>         Lambert Conic projection to try to reduce the latitude spread
>         effect.  Short answer, less data means larger area of city.
>         Paris has the highest density in the world (I fit 16 4km x 4km
>         tiles in 20MB), Boston has the highest density in North
>         America (49 tiles).
>         
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