Hello,
Today I would like to share with you a very interesting collaborative effort: the Open Data Day. This event, held on 21th February 2015, has a main goal “to show support for and encourage the adoption open data policies by the world's local, regional and national governments”. During this day, thousands volunteers from hundreds cities around the world joined their efforts “to write applications, liberate data, create visualizations and publish analyses using open public data”.
Anyone could organize a local hackathon and to hack on anything that involves open data. The only demand was that each city’s hackathon shared its project with at least one other city as a way to promote the collaboration.
If you are interested on open data and you want to participate with this project in your city, in this map or in this wiki page you can look for if some people was working in your city during the Open Data Day.
Enjoy it!
Andreu Sulé
University of Barcelona