Re: [Talk-GB] OSM feature density vs edits per features

[De Sabbata, Stefano (Dr.)]

Dear all,

I would like to warmly thank all those who have taken the time today to answer 
to my email – this has been most helpful!

If you have further thoughts, or if you like to see some aggregated stats 
mapped for Greater London, please do get in contact. I have some drafts of my 
current analysis that I am happy to share, although they are not ready to be 
published. Although, I actually did publish some very early stage map on the 
work I am doing (which OSM is part of) on Twitter some months ago.

https://twitter.com/maps4thought/status/854843894860845057

Also, last year I did publish a short paper (also a slightly different, simpler 
analysis than what I am doing now) focusing on Leicester (see link below). Any 
comment on that would helpful too. :)

http://escholarship.org/uc/item/5hc4d2q6

More recently, I collaborated on a paper titled “Geodemographic biases in 
crowdsourced knowledge websites: Do neighbours fill in the blanks?” – although 
that’s based on a relatively small and specific sample of places with alcohol 
licence, in the scope of future health policy analysis.

https://twitter.com/maps4thought/status/868064714466754560

All the best,
Stefano.


From: SK53 
Date: Friday, 1 September 2017 at 18:50
To: Philip Barnes 
Cc: "Talk-GB@openstreetmap.org" 
Subject: Re: [Talk-GB] OSM feature density vs edits per features

I suspect the problem with Leicester is simply fewer mappers and therefore much 
more higher noise to signal. Also Leicester is odd in having a very active 
mapping community early on and much less (comparatively) activity more 
recently. Although the same is probably true of both Liverpool & Manchester.
Given that active mapping communities on a per country basis are often in the 
hundreds or low thousands using a city as big as London makes sense, even 
allowing for the effect of visitors. It's also too big for a few dedicated 
mappers to do on their own.
J

On 1 September 2017 at 18:13, Philip Barnes 
> wrote:
On Fri, 2017-09-01 at 12:04 +0100, Andy Townsend wrote:
>
> One thing you won't be short of is the sheer volume of data.  If you
> like a challenge, go for it - but I suspect that you might be better
> starting with somewhere with fewer variables if you want some
> quantifiable results to come out of it.
>
Or as you are based in my old hometown of Les-tah, why not use that as
a starting point to get to grips with OSM data. It has fewer variables
and is mostly mapped by locals. It is not such a tourist attraction as
London.

And as for learning OSM it makes sense to start with where you are, if
something is puzzling you then you can go and have look see without
traveling 100 miles.

Phil (trigpoint)

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[Talk-GB] OSM feature density vs edits per features

[De Sabbata, Stefano (Dr.)]

Dear all,

my name is Stefano, and I am a lecturer in geography at the University of 
Leicester. Volunteered geographic information and OSM have been one of my 
research interests for a few years now. I have also done some very minor 
contributions to OSM myself, but never in London and I am not very familiar 
with the London OSM community.

As I have been recently looking at some aspects data production and quality of 
OSM in London, and I was wondering whether any of you might have some time to 
help me out in interpreting some of the data… I have a couple of maps that can 
use some local expertise to make sense of them. :)

In particular, I am looking at the relationship between feature density and 
number of edits per features (among other things). It looks like there are 
areas of London with consistently high density but low average number of edits 
per features. I was wondering whether this might be the result of local 
projects or mapathons organised by the community? Or might there be (and most 
probably there are) other reasons I am overlooking?

If you are interested, please contact me: at 
s.desabb...@le.ac.uk

All the best,
Stefano.


Dr Stefano De Sabbata
Lecturer in Quantitative Geography
Department of Geography,
University of Leicester, University Road, Leicester, LE1 7RH, UK
t: +44 (0)116 252 3812
e: s.desabb...@le.ac.uk
w: 
le.ac.uk/departments/geography/people/stefano-de-sabbata
twitter: @maps4thought

Research Associate
Oxford Internet Institute, University of Oxford
oii.ox.ac.uk/people/desabbata
Information Geographies
Connectivity, Inclusion, and Inequality

[id:77B79125-D80D-4E72-9F70-791C2419DE28@home]

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