Could be a cool feature if it was possible to draw on a map and store the map. This could be used to share interesting places or a place where something should be done eg maintenance of a road
Additional thing could be to be able to insert pointers - and potentially link them together
If it was possible to draw a routing on a map this could be cool as well
Or having a interface in the app where you can create an overlay/route like here
https://www.scribblemaps.com/