On 5 and 6 March 2026, the Croatian civic organisation Gong held the thirteenth edition of its Open Data Days conference at ZgForum in Zagreb, a two-day programme of panels, lectures and workshops on open data as a tool for civic oversight and public information.
This year’s topics included amendments to Croatia’s Freedom of Information Act, the impact of artificial intelligence on democracy, and practical applications of open data. It was in that part of the programme that Martin Kajtazi presented Arhium, a digital platform that unifies cadastral data and spatial planning documentation, and Nema dima, an interactive map of smoking and non-smoking venues across Croatia.
Both projects are built on public and open data, so the conference was an opportunity to show what can be made from that data when it is brought together in one place, and why it matters that the state keeps opening it up.