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Using GPS
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• The Sun and Moon traveling across the compass as time passes with
the Sun/Moon compass. In the center of the compass, a shadow grows
and shrinks and changes direction as the Sun moves across the
compass (similar to a sun dial).
• Sun rise/set and Moon rise/set information.
• Moon cycle information (such as the day of the moon cycle and the
phase).
Averaging
The Averaging option allows you to load .gpl files and average the data points they
contain. With the Averaging option, you can select and delete average points and
customize the names of average points.
To Average Points
Note Click Undo at any point in the Averaging process to undo your last action.
Click Clear All to remove all of the GPS points from the map window.
1. Click the GPS tab and then click Average.
2. Select a .gpl file from the file directory and click Open.
3. From the Edit Points group box, click the Select Points button
.
4. Drag a box around the points you wish to average. The points you included
are highlighted.
OR
Press the SHIFT key on your keyboard and click to select individual points.
Note Click Delete to delete selected points.
5. Under Edit Points, click Average.
The selected points are now represented by one averaged point.
6. Type a label for your averaged point in the Point Label text box. The default
label is "GPS Average."
7. Click Save.
The averaged point is now part of the active draw layer and is not a valid GPS
point. All averaged points that have not been saved are saved to the active
draw layer. You can no longer manipulate these points using the GPS
Averaging option.
About GPS
What is GPS?
The Global Positioning System (GPS) applies modern technology to the ancient
basics of navigation. The U.S. Department of Defense has developed and launched a
series of positioning satellites in an orbiting constellation. These satellites are used
as reference points much the same way stars have been used in conventional
navigation.
Using these satellites, a GPS receiver can determine your position anywhere on the
globe. GPS provides accurate information about coordinate position, elevation,
speed, and direction of travel. Many people have discovered the benefits of GPS for
tracking vehicles, recording routes, and much more.
How Does GPS Work?