Figure 16: Dual Sensor Operation With Trapeze (1M Traverses) - Bartington Grad601 Operation Manual

If we consider a 30mx30m Grid with a line spacing of 1m, then the first line is positioned 0.5m
from the top edge of the Grid and the remaining lines are then spaced at 1m intervals down the
Grid. The last line is 29.5m from the top of the Grid. Similarly, if measurements are taken along
the line at intervals of 0.5m then the first measurement will be taken at 0.25m from the start
of the line and the last at 0.25m from the end of the line. The results from each Grid will then
interface seamlessly with adjacent Grids without the need for a reference edge (Figure 14).
Note: Determine the four corners of the Grid using standard survey practice, and mark
them out with non-magnetic flags. The traverse starting and finishing lines can be marked
BARTINGTON INSTRUMENTS

Figure 16: Dual sensor operation with trapeze (1m traverses).

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