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Grid Scan
Figure 7-8: Marking ending positions
An example grid layout is shown in Figure 7-9.
Figure 7-9: Example of a grid survey. The red lines are superimposed just to illustrate the concept.
7.3 Data Collection
7.3.1
Physical Data collection
It is critical that the starting position is consistent on every line. Line up the middle of the unit
with the starting line, and then push the system straight towards the end of the line. It is helpful
to have a marker at the end so you have something to aim for.
Not all lines have to be finished. If there is an obstruction preventing you from finishing the line,
you can simply press Stop and end the line early. Do not try to steer the system around the
obstruction, as this will throw off the positioning of the data.
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