You run a map shop that only opens at night. Customers — adventurers, monsters, the occasional mage — describe a place from memory or rumor, and it's your job to draw a map that matches what they're asking for.
Listen to what each customer says about the place they need mapped — the details are the clues.
Piece together the map from those fragments rather than a clean, complete description.
Different customers react differently to accuracy versus creative interpretation, so not every map needs to be perfect to satisfy them.
Keep the shop running through the night — reputation carries over between customers.