Psychogeography is a way of exploring environments through playfulness and roaming(drifting). This can be seen through open world games, as its meaning and reason is a playful turn on an environment. Games like Dying light, that are set in urban environments and force you to use parkour to get around instead of the typical modes of transportation.
Another way to look at is to see it as an art form that plays with the typical way things are done, like instead of words leading to other pages of a website making it an image or gif. These being different way to transport your way through the site. It can also be with how a map is made. For instance an artist delved deep into london and took ten years to make this image. That image was created by Fuller, a british artist who uses imagery to represent the things seen in an area to then make it on a map. So a forest has trees but also some flowers or water has a bunch of different swirls to represent it and a place with alot of music has a cartoon face with music notes.