Reducing Tracklog Size - GPS TrackMaker Reference Manual

4.4 Reducing Tracklog Size

Tracklog Reducer function, accessed through the button
track point's number in accordance with the reduction level chosen by the User, letting you transfer a more
compact Tracklog to the GPS, that occupies less memory.
It is obvious that any reduction of a Tracklog can cause loss of precision, however, you must estimate if that loss
will harm the navigation. Most of the time that won't happen.
The Tracklog Reducer function won't delete the old Track, allowing you to compare and to estimate if the
reduction is adequate.
To access the reduction Tracklog window, first it is necessary to select one or several Tracklog segments using one
of the selection tools indicated in
Reducer option in Tools menu.
The reduction window will open with the following options:
• Reduction Levels: 0 - maximum level ▪ 10 - minimum level
• Resolution: This option allows the maximum reduction possible, best for large Tracklogs with several
Trackpoints. The program verifies if Trackpoints are aligned into the same horizontal plane, reducing the
several segments of lines that present little pronounced deflection to just two points.
• Distance Interval: Basically in this option, the program establishes a maximum fixed distance defined by the
reduction level and it divides the Tracklog, establishing distance intervals relatively fixed. It is a reduction
technique that presents a larger amount of Trackpoints in relation to the Resolution system, allowing for a
better precision.
• Create a Route: In this option, the program creates a Route following the Tracklog, having as many Route
points as are established by the User. This option is especially useful when the User doesn't need a lot of
precision in Tracklog indication, setting the whole memory of the GPS free so new Tracklogs can be stored.
• Cut Tracklog if exceeds: this option limits the maximum number of vertexes, dividing the Tracklog in
smaller parts with maximum number of vertexes specified in the text box. This option doesn't affect the details
and the precision of the Tracklog.
•
Selects Old Tracklog on Exit: Enabling this option, the program will select the old Track on exit, allowing
you to delete the Tracklog when exiting from the Tracklog Reducer window.
Selecting Data. Then, press the button
48
allows you to reduce the size of a Track, reducing
in Tool Bar or choose Tracklog