When considering canon-based spells, potions, and quasi-sentient objects such as wands ¹, what type of magic was likely used to create the Marauder's Map? I was thinking Homenem Revelio might be involved, but I can't recall any other object in Potterverse that acts quite like the Marauder's Map.
Is there a canonically-based explanation regarding the magic used in the creation of the Marauder's Map?
¹ JK Rowling: Essentially, I see wands as being quasi-sentient. I think they awaken to a kind of- They’re not exactly animate, but they’re close to it, as close to it as you can get in an object, because they carry so much magic. So that’s really the key point about a wand. Pottercast Transcript - The Leaky Cauldron - 01.02.08