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 Post subject: Exporting track data
PostPosted: Wed Aug 24, 2011 10:30 pm 
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Joined: Sun Feb 14, 2010 10:35 am
Posts: 39
Is it possible to export ALL the track data that my track log collected and is being shown in the Overlay Properties panel in MM on the PC?

At the moment when I do a track export to CSV and then open that file in Excel I'm only getting some of the track data.
The obvious stuff I can decipher is the number of points the tracklog recorded and the lat/long position of each point, I can see the height of each data point too. Then there's a bunch of data I can't understand and thats the problem I think.

What I'd really like is to be able to export all the useful data:
Total distance, elapsed time, average speed - so I can export to Excel and do some statistical work with the data.

Any ideas?
Thanks
Hank


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 Post subject: Re: Exporting track data
PostPosted: Thu Aug 25, 2011 11:14 am 
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Joined: Tue Nov 24, 2009 12:30 pm
Posts: 894
Hi,

The format of the CSV files can be found by Searching (don't waste time with the Index tab) for "CSV" in the embedded help. For tracks (which probably is still for MM 2004 as there is no reference to the line styles in V5 :shock: ) it says :

Each Track line of the file is in the form:
TK01,Name,Category,visible, locked, n_points,closed_loop, color, partition_time, tick_interval, update_distance, update_interval

Each track is immediately followed by the required number of track points:
TP02,Lat,Long,Altitude,Time,Speed,Course,Heartrate


All the other data can be calculated from that (for example in Excel), although the calculations are not trivial (I think it has been discussed in some threads on this forum). For example the Lat/Long is in degrees so you can't simply use Pythagoras for leg lengths as you can with OSGB/UTM, etc.. AFAIK, the Altitude and (maybe) Speed/Course come from the GPS engine so may not (necessarily) be the same as on the map or calculated from Leg coordinates and Time.

But beware that many Garmins don't record time in their "Saved" track logs (you must use the "Active Log" data) so much less data is available to use for the calculations. More obviously, there also can be no Time/Speed data with tracks drawn within MM or converted from a Route.

Cheers, Alan.


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 Post subject: Re: Exporting track data
PostPosted: Sat Aug 27, 2011 10:49 am 
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Joined: Sun Feb 14, 2010 10:35 am
Posts: 39
Thanks Alan - much appreciated


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