Dead by Daylight Cartography
If you came here for tips about the map item I'm afraid that you're going to be disappointed. If you came here to learn all about the actual levels the trials occur in then you've come to the right place.
Before we go any further I'd like to clarify that this is a work in progress post/thread. The game updates and I don't know of anyone that has every single map fully charted out. I'll post information here once I am confident that it is semi-accurate.
So far, I've discovered this site with a great helping of map information: https://gameplay.tips/guides/362-dead-by-daylight.html