Everything you wanted to know about maps, but were afraid to ask

Maps are ubiquitous in the modern world. From paper streetplans in tourist leaflets, through metro line diagrams, route-finding apps and global on-line imagery - we are all surrounded by maps. However many things, we are used to call "maps" are not maps actually. This lesson will show you how underground plans, websites or video games show space to us - and what pitfalls await us on a seemingly very good map.

(Ilustration: Gerard Mercator map, drawn in 1569. Public domain, source: Wikimedia)