Cultural Map of the World (Inglehart-Welzel)
This is an application of a factor analysis plot, used in this case to display the 'cultural proximity' of several countries. This proximity is calculated based on survey scores on areas such as politics, religion and social life. The data is 'reduced' to some dimensions (displayed in the axis of the chart) and then plot according to how much they load in each dimension. This type of graph is used specially in qualitative research.
Map view of a Similarity graph
This map shows the relationship between 1000 tv shows as a function of their similarity. Each show is linked directly to the 10 most similar shows, which in turn have been grouped into clusters or 'countries'. This mapping techinque is being applied to the visualisation of consumer recommendations, not only for television, but also for music and books.