I’m doing research on community engagement in HOT, so can answer some of these at least partially.
> On 4 Jun 2015, at 23:34, Milo van der Linden <m...@dogodigi.net> wrote: > 1. In pre-crisis taskprojects; Do you think it is important to have a person > or organisation publishing announcements and "attracting" volunteers to a > task? As far as I can tell, Missing Maps uses a combination of: - monthly mapathons in a growing number of cities - sustained promotion on FB & Twitter - email notifications to pull past participants back in … and they’re most likely the best of the key HOT initiatives at retaining contributors for low-urgency projects. (I’ve looked at the numbers.) > 2. Is there a way to get (a rough estimate) on time volunteers spend on a > task? It always depends. Many factors involved, as Andrew says. However there are some ballpark numbers you can use. I don’t have specific numbers per project or even task, but I’ve computed total labour hours for first-time contributors, across all projects. - 50% contributors work for at least 2 hours total - 20% contributors work for at least 9 hours total (All such contributor statistics tend to be long-tail distributed, so simple averages wouldn’t be very meaningful.) See slide 11 of my HOT Summit presentation on the topic: http://talks.dekstop.de/Martin%20Dittus%20%23hotsummit%2020150502.pdf > 3. Is there a (rough estimate) on the number of objects (nodes, ways, > relations) an average volunteer produces during a task? > 4. Do you think it would be possible, given the size of a geographic "area of > interest" to estimate how many volunteers and/or mapping days would be > required to succesfully complete a taskproject? In the projects I’ve looked at people tend to contribute at a rate of 500-600 edits per hour. It varies by project and contributor. Pete Masters of the MSF found that people contribute 75 buildings an hour, which is maybe a more useful number. Again, these numbers are somewhat useful to build estimates, but also potentially really misleading — projects and geographies are often quite different. That said, I can see how it could be useful to have a model of expected volunteer capacity for use in project planning. Get in touch if anyone is interested in building such a model and looking for evidence, I’m not a task designer but I can certainly contribute stats. m. _______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot
