Add navigation cue/pointer and/or crosstrack to follow an imported track while recording your own

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Give option to "play" or "follow" an imported track/kml/gpx while 
simultaneously recording your own.

In other words, import other people's rides/hikes/runs and add a turn or 
direction arrow to the stats screen of your currently recording track so you 
can essentially navigate to follow someone else's route while recording your 
own progress.

Could be a simple arrow indicating relative direction to the loaded track (the 
one you want to follow) or a "crosstrack" field (i.e. - distance/error from 
planned track like in aviation) or even an upcoming direction a la google maps 
navigation.

Original issue reported on code.google.com by parttime...@gmail.com on 13 Feb 2014 at 10:55

• Merged into: #1457

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[deleted comment]

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Original comment by jshih@google.com on 31 Mar 2014 at 5:27

• Changed state: Duplicate