109 GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
If you have the lane guidance option selected, you are automatically guided to the next waypoint
when you reach the end of the line. Alternately, you can stop taking readings at a particular point on
the line, move to the next line and resume your survey at any desired location on the line.
In addition to the automatic grid generation and lane guidance features, the coordinates in this
navigation mode can be referenced to a Local Grid or to a Rotated Grid.
The
Local Grid takes as its origin the START point but with arbitrary coordinates assigned by you.
The orientation of its axes remains parallel to NS and WE directions the same as the UTM
coordinates.
The
Rotated Grid uses the same origin and arbitrary coordinates as the Local Grid, but the axes are
rotated so the Y-axis takes the direction of the line.
The following picture shows how the different systems relate to each other.
Figure D 1 Automatic Grid (UTM, Local Grid, and Rotated Grid)
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