>>2450022>I want to put markers on the map on where things like geocaches, little huts, creeks and our camps are.I do exactly that, I make my own offline maps with the best available topographic maps from the countries I visit (usually that's the official government ones).
I'm too lazy to go into great details, but you're gonna want to do some research on Mobile Atlas Creator which will create the offline map, and OruxMaps where you will import this now created map and display it, add markers, routes on it etc...
This is a niche thing and I'm probably the only one on /out/ that does it but it gives me the absolute best navigation I can get.
OruxMaps is absolutely insane in terms of functionalities it proposes. And you can even download it for free to try it out, the paid version is just more up to date. Best 4€ I ever spent. I'm a poorfag but the app could have been 20 or even 30€ I would have paid them. If I were a richfag I would make a big donation to the crazy autists coding this thing, they deserve it.