The Atlas
The map of everything settlers have seen and built, day by day.
The Atlas is the territory's map, kept at the survey office. While you play, tap the menu button beside the clock and pick Atlas. It opens in its own tab so the game keeps going, and the wiki and the Lantern are in the same menu. You can also get to it from the home page or by going to /atlas. It shows the land as far as anyone has been, what's been built on it, and the Lantern's news down the side.
The first time anyone walks within about 80 metres of a stretch of country, the Atlas notes the day and who it was. You can see further than that on a clear day, but the surveyors only put down what someone has been close enough to look over properly. If you change your name, the Atlas changes it on everything you found under the old one. Drag the slider along the bottom, or press Play, to watch the map fill in from the day the camp was pitched.
Like the Lantern, it's a quarter of an hour behind, so nobody can use it to find where you are right now. Landmarks go on it once someone has found them; gold, rich seams and herbs stay off it.