2nd degree recommendation: At (the also great) Unsung, Marcin Wichary highlights a series of carefully illustrated articles by Justin O’Beirne that document and discuss the (sometimes surprisingly dynamic1) evolution of style and content of Apple and Google Maps over the years, for example about the churn of POIs2.
Another interesting example is the anecdote about firefighters’ map use highlighted by Marcin. The articles are a few years old, but the insights are still relevant and interesting to read if you work with web maps.
