Using freeware only (so as to be a general purpose solution), how do you
ROUTE on foot following an edited GPX track overlaid on a USGPS
topographical map on your mobile device?
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Currently, I perform the following three actions, where this question is
about the last action, which is FOLLOWING a modified track on foot over
rough terrain.
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1. On the mobile device, I save the track & export to GPX format files.
2. On the desktop, I _modify_ that track overlain on a USGS topo map.
3. *On the mobile device, I wish to now _follow_ that track.*
The question is how do you do #3 above?
Bear in mind, any software that simply shows your current position on a
USGS topographical map will "work", but I'm asking for a purpose-built
routing software which *speaks* directions to get back on track.
Perhaps it would say something like:
o Your waypoint is 1000 feet away at 287 degrees
or, maybe something like
o Your track is five feet at 45 degrees
Where the point is that the directions are spoken (as you're hiking so you
don't want to be looking constantly at the mobile device), and that the
directions are intended to vector you back to the track, where being off by
only ten or twenty feet is probably the maximum desired margin of error in
mountainous terrain.
In summary, as Usenet is a potluck picnic where everyone strives to add
value, the request here is to ask those who already have a solution what
they use, so that others can follow, literally, in their footsteps.