ISTR, several years ago, Ordinance- Survey maps being printed individually, on demand, by an inkjet plotter.
Wide-format printers about 4 feet wide are fairly commonplace for printing posters, vinyl banners and the like.
I can see your local Aviation-shop, or even the larger airfields, installing one and printing , on demand, straight from the relevant Authorities' database. such a map can be date/time-stamped and updates readily identified and appended.
I always wondered, when buying an A-Z town map/street index, just how long ithad been sitting on the shelf....my current Manchester area one is hugely at varience with reality. In the case of Oldham roads and railways have completely vanished...thanks to the internet, an instant update can be had and printed.
How did we manage, before Computers and Cellphones?