This post is part of the Wikiprogress series on Data and Statistics in the lead up to Open Data Day on 22 February."
Open data is data that can be freely used, re-used and distributed by anyone, only subject to (at the most) the requirement that users attribute the data and that they make their work available to be shared as well.
Hosted and supported by the Open Knowledge Foundation, Open Data Day Hackathon is an annual day where people around the world celebrate open data by hacking, holding forums, analysing data and hosting workshops. Going on since 2010, the event aims at raising awareness for the open data debate by showing support for and encouraging the adoption of open data policies by the world's local, regional and national governments. More...