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5.6.4 Navigating Using the Map
In the Field 5
Usually you will use the Navigation module to guide yourself to a
Target, which may be either a waypoint or a feature you want to
update. You can also use the Map module to:
orient yourself in the area you are working in
get a general indication of the location of a feature you want to
find
find or select features or waypoints to navigate to
plot a course from one place to another
Cursor
In the Map screen, the GPS cursor shows the current GPS position
reported by the receiver. It is always enabled in the Map screen,
although it may not always be within the visible part of the map. You
can use the&softkey to hide or display the GPS trail, the heading
showing the direction you are traveling in and other options on the
map display. The GPS trail is a line of dots showing up to 60 previous
GPS positions.
Note – The Map screen and the GPS position will be affected by the
accuracy of your GPS source. Unless you have a real-time source, or
are viewing a file that has been differentially corrected, positions
shown on the map are only accurate to within about 100 meters.
If you use any of the arrow keys on the datalogger, the map cursor
appears at the center of dotted horizontal and vertical cursor lines. The
Coordinates display, if it is enabled, now shows the position of the
map cursor. Use the arrow keys to move the cursor crosshairs. When
you position the crosshairs directly over a point feature or any part of a
line or area feature, the feature becomes selected.
Note – If the open data file contains more than 5000 features, the map
cursor is not visible and cannot be used to highlight or select features
or waypoints.
TSC1 Asset Surveyor Operation Manual 121