Making the Marauder's Map: Can I make a map that changes?
Those familiar with the Harry Potter series may be familiar with the Marauder's Map, a map that allows the holder to see where people are at any given time. It displays a person as a set of footprints with a label next to them. The footprints appear and then fade as a person walks along.
For all intents and purposes, this is a map that changes over time. It's pretty cool, and I would, of course, love to have one in a story of mine.
The only restriction is that the map cannot be a screen. It has to be like a classic map: A scroll of material that can be carried around. I know there are advanced screens that can do that, but I'm not allowing them.
The map needs to change in some way. I suppose that attaching a microprocessor and a receiver could take in information real-time, and then provide control to the map, or the map could change in a cyclical fashion. Either way, the display needs to change.
Can this be done? Let's say that the technology level is circa 2000.
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