I was thinking it could be more of an automated thing as opposed to being 100% player-controlled, thereby disregarding the reality bubble.
Option A)
Fire up a drone, it “automatically explores” the surrounding area in X tile radius over a time period of 1 hour, returns, and lands at the starting spot where it can be picked up again. While the drone does its thing, the overmap is updated every 5 minutes, gradually revealing the map in circular fashion. I mean, if you can imagine how circle (drone’s vision radius) travels in a wider circle (circular travel path)…
Option B)
Start a drone, it flies in a straight line at the chosen direction, and returns, revealing a thinner but longer stretch of the map.
Option C)
Fly in a straight line at a chosen direction until almost out of fuel, then land. A long but thin strecth of the map is revealed and the drone’s landing site is marked on the map.
Should weather be a factor? Force drone landing if thunderstorm hits? Resume when weather clears?