You already learned the basic steps for working with myTracks. This chapter explains how imported tracks can be edited. myTracks is not a full featured track editor but provides some features for correcting existing tracks.
GPS loggers are sometimes inaccurate e.g. between high buildings. In these cases you may want to correct these track points manually.

Selecting track points

To do corrections you have to select one or more track points first.

There are different ways to select track points:

  1. Select a photo in the photo list and the corresponding track point will be selected.
  2. Select one point in the track point list. Hold down the shift key and click another to track point in the list to select all points in between.
  3. Click into the map and the nearest point will be selected. Hold down the alt key and click into the map to select all points between the first and the second point.
  4. Click into the track view to select a point. Hold down the alt key and click into the track view to select all points between the first and the second point.

The (first) selected track point is shown with a pin in the map. The part before the selected track point(s) is shown in green the part behind is shown in red. The selected part is shown in blue.

The following screencast shows the different ways of selecting track points:

Start Screencast

Moving track points

To be able to edit track points you have to enable the edit mode first by clicking the corresponding button. Then select one or more track points and use the mouse to move the selected point(s). To avoid unwanted changes you have to press the alt key when moving the points.

See the following screencast for an example:

Start Screencast

Splitting tracks

There are different ways of splitting tracks:

It is also possible to join tracks. In this case select the corresponding tracks first and then choose "Join Selected Tracks" from the Tracks menu.

Simplifying tracks

You may want to decrease the number of track points especially for very long tracks. myTracks uses the simplification algorithm of gpsbabel for this. Select a track and then choose "Simplify Track" from the Tracks menu. You have to specify the number of track points of the new track. Additionally you can specify whether waypoints and track point with photo links should be preserved. These points will not be "simplified" but wil be added to the new track after simplification. This can increase the number of track points of the new track.
Often the question arises: How many track points should I choose? It is not easy to answer this question because it depends on the type and length of the track. Therefore just trial&error. In any case myTracks will create a new track and the original track always remains unchanged.

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