Question about Garmin eTrex Vista GPS Receiver

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Fragmented track logs

When track log is down loaded it is in fragments this generates several altitude profile graphs for the same log. Is it possible to combine these or prevent this happening.
Regards John

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Part 1 of answer:
If you record a track log from A to B, then turn it off and back on to record a track log from C to D, it is obvious your track logs will be fragmented, even though they may not be recorded separately. They may appear as a single, interrupted, trip.
Maybe you've got this one, or this was not your question, so there is a:

Part 2:
Even if your unit can record track logs of up to 10,000 points, it cannot receive track logs back from your PC bigger than 250 points.
So, track logs get fragmented when uploaded back. To have them again in the GPS you must edit them to 250-point separate packages.
It can be done, for most track points are usually superfluous, especially when you record straight trajects; if your track log has many curves, it gets harder to simplify them.
Some software packages have a "Simplify track" tool, which solves this automatically in seconds, but it is the software who decides what to keep and what to remove, so edited track logs can be pretty unaccurate.
The only other option is to edit them one by one, so it's you who decides which track points are necessary or not. It can be painstakingly slow, but it pays if the tracks are important for you to use again and again.
Maybe I have not answered exactly what you needed to know, but anyway the solution is, or at least can be, editing your track logs in your PC. For instance, GPS Expert is a fine software to do that: you can split track logs, eliminate track points, join them back, simplify them or add new track points.
Nothing replaces a good editing software, but to get a useful collection of tracks and routes to use and share frequently, you must work on them for some time.

Best regards!

G. F. Kloss

Posted on Jul 08, 2008

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