"Mon plan du métro de Paris" by Pierre Joseph is an interesting representation of the author's memory of Paris:

Why do I blog this? Maps based on people's recollection of souvenirs and past experiences are always insightful. They tell stories about the person's subjectivity, what count for certain individuals and what is left out of the picture (metro lines/stations...). The use of the same graphical code as the real subway makes it even more intriguing than hand-drawn map as it give an awkward perspective on the city itself (see the real map below). In addition, the different between the two maps highlight the person's perspective in a very coherent way.

When on the field, I enjoy asking informants to draw maps of their mobility patterns. It'd be curious to expand this method to such kind of representation too.