What would psychocartography mean, if there was such a word?

Logically, you would think the word meant the mental process of map making.

According to http://www.lexfiles.com/basic-grk-m-z.html the prefix
'psycho-' comes from a greek word/is a greek word meaning "the mind or
the mental processes"

From http://encyclopedia.thefreedictionary.com/cartography the word
cartography also comes from Greek and means "the study and practice of
making maps or globes"

So from these 2 sources, I tihnk it might mean 'making a map in your head'.
Hope this help,
edejl-ga

How about "mapping where the crazy people live"?

or trying to make a map OF the mind ?

The process of mapping the dreamscape is known as psychocartography.
It involves the recording of landscape in dreams over a long period,
then connecting the smaller maps into a larger one. Remarkably, people
who have done this develop a very consistent map of their dreamscape,
which evolves just as the macrocosm does.
find more on this belowed link
http://forum.rstheory.com/viewtopic.php?t=41&sid=5ba7f9a248a0e992fe23325939a8c4c6