A must see series of videos on data visualization. In addition to a number of compelling examples and interviews, it also offers resources for each chapter of the presentation.
More than a few of the visualizations involved mapping data onto traditional maps.
The mappings that I saw illustrated appeared to all use clean data.
That isn’t a criticism, it certainly makes mapping easier.
But what if I don’t have clean data?
Or, I want to add data from a source that identifies some of the subjects differently?
Those sound more like questions that topic maps are poised to answer.