[pharke]

Or a decent high res LED projector, would have cost less than the foam board he stuck the map to and he could have it done in a day.

[ZeroGravitas]

Given his objectives specifically included high resolution enough to see details on the map up close, even a 4K projector would have fallen far short of this.

[cuu508]

Yes, for 3mx2m at 300dpi one would need something like 35k projector

[pharke]

Projectors aren't limited to displaying static images, but I guess the format is a matter of taste.

[rjaco31]

He raised the "you cant lean without having your shadow masking everything" problem