One could make the visualisation app work for a reduced data set and then constantly add to it whilst downloading. It would also make development easier. So you

One could make the visualisation app work for a reduced data set and then constantly add to it whilst downloading. It would also make development easier. So you start with 2-3 years, make the app, make some scripts to automatically download and process what you need to process, and then add the other 147-148 years. This means... downloading only 164 - 245 GB of data... that'll keep me and my 10mbps broadband busy for more than 2 days :)