(From IHE Delft website)
The Copernicus Hackathon Programme, financed by the European Commission, brings together developers, experts, and entrepreneurs. A hackathon (hacking marathon) is a design and development event in which participants with various fields of expertise and skills work in groups collaborating intensively on software projects towards tackling a specific challenge within a short timeframe.
The goal of a hackathon is to create functioning software by the end of the event, being the desired result of an operational prototype / demonstrator of the developments performed.