Sokkia SRX1 Operator's Manual page 122

20. SURFACE AREA CALCULATION
3. The measurement results are displayed. Press
[YES] to confirm.The value of point 1 is set in
"01".
4. Repeat steps 3 to 4 until all points have been
measured. Points on an enclosed area are
observed in a clockwise or counterclockwise
direction.
For example, the area specified by entering point
numbers 1, 2, 3, 4, 5 or 5, 4, 3, 2, 1 implies the
same shape.
After all known points necessary to calculate the
surface area have been observed, [CALC] is
displayed.
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