Many GPS devices and apps have the capability to track your current position via GPS. If you go walking, running, cycling, flying or driving, you can take a look at your exact route and your average speed.

Some of these devices or apps also allow you to export your routes in various formats, e.g., the popular XML-based GPX format.

I want to show you my attempts to

- read in a GPX file using R and its XML package,

- calculate distances and speeds between points,

- plot elevation and speed,

- plot a track,

- plot a track on a map.

Here are the results. Everything below the plots shows you how to do it in R. Drop me a comment if you have any questions.

The altitude of the track in time, with smoother. Click to enlarge.

The speed during the run, with smoother. Click to enlarge.
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