TracBack on Mapsource / Garmin Question for following a long trail

[squid]

This is one is in depth but see if you can help at all

I have a very long off road route - too long to use waypoints.

So, I have used the merge tool to add a number of tacks into one with over 4000 markers.

This looks fine on Mapsource and follows the trail accurately.

When I send the track to my satnav (a quest1) it shows the breadcumbs fine.

The problem starts when the back track is set to follow track.

The pink route it is creating must be jumping markers as it does not follow accurately enough. Anyway of improving the resolution of the tracBack?

I can filter the track down in mapsource but not up if that would help.

Also, is there a simple way to work out if you are going to be guided up the track in the correct direction? I cannot tell if it requires inverting or not as I did not create the first file.

 

[squid]

This is one is in depth but see if you can help at all

I have a very long off road route - too long to use waypoints.

So, I have used the merge tool to add a number of tacks into one with over 4000 markers.

This looks fine on Mapsource and follows the trail accurately.

When I send the track to my satnav (a quest1) it shows the breadcumbs fine.

The problem starts when the back track is set to follow track.

The pink route it is creating must be jumping markers as it does not follow accurately enough. Anyway of improving the resolution of the tracBack?

I can filter the track down in mapsource but not up if that would help.

Also, is there a simple way to work out if you are going to be guided up the track in the correct direction? I cannot tell if it requires inverting or not as I did not create the first file.

Right, I will answer my own question in case another Quest user requires the information.

Make one single track by joining them as stated
Open tracback
Select no to track to the begining
Use the selector to pick a point on the track - the closer to the start the more accurately it tracks the line.

Repeat this and you can follow a track accurately for over 2000 miles.

The Quest reads multiple tracks as one, if you don't join them it will and creates loops all over the place.

I cannot see how they can be reversed on the device though.