Data Import Tool - GPS TrackMaker Reference Manual

2.19 Data Import Tool

In GPS TrackMaker®, file import can be done with data saved in geographic coordinates, saved in a rectangular
coordinate system supported by GPS TrackMaker® and saved in a local grid.
The import window will appear when the User opens the file to be imported.
Most of the imported files don't have the datum indication in which the data will be saved. So, you must correctly
indicate the datum and the zone, in cases of file import in rectangular grids such as UTM. See
learn which are the available datum systems in GPS TrackMaker®. Also see
The wrong indication of the datum doesn't harm the import. But differences of some dozens or hundreds of meters
between the real position of the data and the indication in GPS TrackMaker®'s screen can appear.
Importing data in Geographic Coordinates
Before the file import, GPS TrackMaker® analyzes the maximum and minimum limits of the data. If the values are
compatible with geographic coordinates, a window will be opened, asking for the choice of the datum in which the
data will be saved and the appropriate coordinate system. To import geographic coordinates, choose Geographic .
Importing data in a Specific Local Grid
If the Local option is selected, the data will be imported, adopting a specific
metric grid of an origin defined by the User.
So, avoid using data that has a horizontal width greater than 6º, because
deformations created by Meridian Convergence (Grid Declination) can appear.
Importing data saved in a Rectangular System
Before the file import, GPS TrackMaker® analyzes the maximum and minimum
limits of the data. If the values are compatible with some rectangular system
supported by TrackMaker, the window to the side will be opened, asking for the
datum in which the data will be saved, the zone and the indication of the
supposed rectangular coordinate system. Choose one of the rectangular systems
indicated in the list.
When importing files using rectangular grids, the wrong indication of the zone
will harm the import, leading the program to recognize the coordinates of each
point in an unusual way. In this case, the User must identify the data
irregularity, re-doing the import in the appropriate zone. The wrong indication of
the zone can displace the data hundreds or even thousands of kilometers off its
real position.
Configuring the Coordinate
30
Datum Table to
System.