GPS TrackMaker Reference Manual page 89

Extrapolate Borders
If checked, the dimensions of clipping rectangle will be increased some hundreds of meters. It is a good technique
to avoid discontinuity of the maps, allowing a small border overlapping.
Clipping Rectangle
By pressing the button , the windows is expanded, showing the coordinates of the upper-left and lower-right
side of the clipping rectangle. New coordinates can be inserted or Waypoints can be selected to indicate the new
limits of the rectangle.
To conclude the clipping, press
Examples
Example 1: in the first example, the whole map was selected by pressing CTRL A and the clipping was
accomplished with 2 horizontal subdivisions and 3 vertical subdivisions.
Example 2: in the second example, a rectangular Tracklogs was created in the middle of the map and selected
with a double click. The clipping was made with 1 horizontal subdivision and 1 vertical subdivision. Note that only
the clipped area remains on screen. The rest of the image is deleted.
Example 3: only the green pentagon was selected and clipped with the option "Clip only Selected Tracks", with 3
horizontal subdivisions and 3 vertical subdivisions.
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