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Colour - changes the colour of the trajectories.
- Line width - changes the line width of the trajectories.
- Line type - changes the line type of the trajectories.
- Time marks - for marking chosen time interval for the trajectories.
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Number of positions - every start position can either be just one point or one
point with four or eight positions around it.
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Radius - distance from the centre point to the four or eight surrounding
points.
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Select positions on the map - When this is selected, the start position can
be selected by clicking the map.
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Start positions can also be typed in, latitude then longitude. The
coordinates can be entered either degrees:minutes:seconds or decimal degrees
and width either +/- in front or NESW after.
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The list shows selected start positions. Even though five or nine markers
are selected, only the coordinates of the centre point is shown
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Delete - deletes marked position.
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Delete all - deletes all start positions.
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