MGI NAVIGATOR GPS User Manual download pdf (Page 17)

GPS Tuner

version 5 – Users’ Manual 17

Calibrating Maps

After creating a map out of a picture file, you must calibrate it. This process adds two

geographical coordinates as reference points on the map. Only after calibrating the map

will GPS Tuner be able to display your correct position (or your partner’s position, track

and route) on the map. Calibration is easy, all you need to do is to provide the geo-

graphical coordinates of at least two points.

Calibration Steps:

1) Open a map image file

2) Tap & hold a point on the map (if you are calibrating a map with active GPS, tap

your location on the map).

3) Select the option Add new/Calib point from the popup menu.

4) Enter the point’s Lat/Lon or UTM coordinate of the point or select one of your

waypoints. If you are using active GPS, GPS Tuner will enter your current coordi-

nate into the text boxes.

5) Press the OK button and add another calibration point (if necessary).

6) Calibration points should be as far from each other as possible, and not be in

line (neither horizontally nor vertically)

After you have added or modified a calibration point, GPS Tuner saves your calibra-

tion data file automatically. The data of the calibrated map is stored in a .gmi file

with the same base name as the picture file. The map can be recalibrated any time.

The map image file and .gmi file have to be in the same folder. You can also see

your calibration points on the list in the Manager window.

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MGI NAVIGATOR GPS User Manual Page 17