I had the great pleasure of spending the weekend using open government data for public good, at Wellington GovHack 2017. I worked on the welly.space team. We investigated data on the quality of rental properties in Wellington. Estimates are that 1,600 people die every year in New Zealand due to health problems resulting from living in cold homes. Thousands more have serious health problems.
While we were able to use several public data sets, there is still a long way to go in terms of opening public data to the public. I encourage everyone to properly secure the data that needs to be secured, but also to make freely available in clean formats and APIs all information that does not need to be secured.