I live in an area with a lot of iron. I cannot trust a compass to always point north. Generally I’ve had no problems in the woods: follow the trails that are on the maps, or at least stay close enough that you can always find them again and you are fine. (until of course you are not)
Phones already do that with cell towers. It’s called A-GPS (augmented GPS). Cell towers, wifi, and even bluetooth, are used in addition to GPS/GLONASS/Galileo signals.
So… maps?
Time to bust out the compass.
I live in an area with a lot of iron. I cannot trust a compass to always point north. Generally I’ve had no problems in the woods: follow the trails that are on the maps, or at least stay close enough that you can always find them again and you are fine. (until of course you are not)
Triangulation could be more efficient than GPS, in terms of energy use and such
Triangulation of what, exactly? GPS already triangulates your position based on what it receives from multiple satellites, yeah?
Cell towers, in an urban area you’re typically within range of a couple.
Triangulation of GPS signals is what allows the System to determine your Position Global(ly)
Phones already do that with cell towers. It’s called A-GPS (augmented GPS). Cell towers, wifi, and even bluetooth, are used in addition to GPS/GLONASS/Galileo signals.
Is that the difference between when something like Google Maps has your general location and when it has your specific location?
A-GPS works faster than GPS on its own.
GPS literally triangulates your position using 3 satellites. It’s how it works.
They should use that in GPS! /s