[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 <sk53.osm at gmail.com>
Date: Friday, 1 September 2017 at 18:50
To: Philip Barnes <phil at trigpoint.me.uk>
Cc: "Talk-GB at openstreetmap.org" <talk-gb at 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 <phil at trigpoint.me.uk<mailto:phil at trigpoint.me.uk>> 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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