A bit of searching shows the specs say 15 million inches, which converts to 381km. I wonder what the resolution has to be, e.g. 1200dpi would mean 18 billion do

A bit of searching shows the specs say 15 million inches, which converts to 381km. I wonder what the resolution has to be, e.g. 1200dpi would mean 18 billion dots across 381km. Then again this SO discussion says there's no such thing as resolution with PDF's: https://stackoverflow.com/questions/50715269/what-unit-is-pdf-resolution-in-and-does-dpi-affect-it https://stackoverflow.com/questions/50715269/what-unit-is-pd...