Thanks for taking the time to do this. Having read this a I've decided its about time I read up on licence issue! I guess that the potential loss of a lot of data could be a reason for some people voting against the changes
Jason On 22 July 2010 10:34, TimSC <[email protected]> wrote: > Hi all, > > To try to get a feeling for the potential consequences of relicensing, I > have been doing analysis of edits in the UK and how contributors have voted > on the doodle poll. I feel that we should look before we leap, regarding the > possible impact of people who refuse to relicense. I wondered how many > nodes, ways and relations would be transitioned in relicensing. I used the > crude assumption that each object has only one editor, which would > underestimate the impact of refuser contributions. I requested the biggest > contributors to vote on the doodle poll to improve the turn out. Although I > only have votes for 1% of individual UK contributors, doodle now has a 24% > turn out when weighted by mapping contribution size. A few mappers account > for a large proportion of UK data. Previously, I did not notice how many > mappers had just done a few small changes: the median number of nodes > contributed is only 10! I also have not considered the response rate once > OSMF pitch the question to contributors, and what happens if the OS data > cannot be relicensed. > > I want to next give my excuses for not publishing the raw statistics. Even > with 24% turn out (by contribution size), the are a few non-committal large > contributors (e.g. me and a few others). Unless the turn out rate is higher, > the stats can be twisted depending on the mood I am in. But there is a > pattern emerging. The overall UK picture seems to be fairly bright for > minimal data loss. Every big contributor I contact votes "yes" to > relicencing (with or without reservations). I estimate an overall data loss > of 5% to 17% for the UK (ignoring the effect of objects with multiple > editors). > > The main exception to this is a small cluster of refusers around London. (I > am not just talking about myself here.) The worst case scenario is 50% data > loss in the Greater London area but, really, I don't know how it would play > out. Because of the density of mapping, there is more likely to be multiple > editors in this area too. Basically, it's a wild card. But I would be > surprised if there are big problems outside the London/SE area. Unless of > course 5% is a big problem - I am not too sure how much work it would take > to patch up omissions, even assuming a relatively smooth transition. > > Anyway, I never was much good at statistics! I just wanted to circulate > something, after many contributors were kind enough to honour my request and > vote on doodle. > > TimSC > > > _______________________________________________ > Talk-GB mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-gb >
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