GPS TrackMaker Reference Manual page 132

Calibrating the Map through Two Generic Points with Known Coordinates
This is the usual way to configure map images and it must be used after loading or after rotating the image. The
practical example below illustrates how to configure a map through two generic coordinates:
TIP: to know in which datum the map was created, see the text together with the map scale. Usually the
indication of the horizontal datum is close to the scale map. Only the horizontal datum is used.
Mark the first point (#1) on the map where there are known coordinates, placing the pointer of the mouse on the
point and pressing the left button of the mouse.
A window will open, asking for the true coordinate of that point. In the example given, for the point #1, type:
Attention: Verify the configuration of
Windows® is configured for English System, type –19.00 and –43.5
The next step is to choose a second point and repeat the same procedure. In the example, mark the second point
(#2) where there are known coordinates, typing the following values in the configuration window:
Important: For a better precision, mark the second point as far as possible from the first point, and avoid
choosing points that are in a same horizontal or vertical straight line.
Immediately after choosing the second point, the program will reconfigure the screen and it will delete the
perpendicular straight line close to the pointer of the mouse, exiting the configuration mode.
First press the button
Configure the program for the coordinate system listed on the map. In the
example given, the program should be configured to geographic coordinates
in decimal degrees (dd.ddddd). The map datum is SAD 69 Mean , therefore,
GPS TrackMaker® must also be configured for this datum.
Point #1
Latitude: -19,00
Longitude:-43,5
Microsoft Windows® for comma or decimal separators. If the MS
Point #2
Latitude: -19,5
Longitude:-44,5
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to enter in map configuration mode: