Spectra Precision Survey Pro v4.9 - Manual (Page 192)

The Compute Area routine computes the area of a flat horizontal plane encompassed by a selected boundary.
[Tap Line…]: allows you to tap an existing polyline defining a boundary from a map view.
[To/From…]: provides selection of individual points to define a boundary.
[Solve]: will compute the details for the horizontal area of the selected boundary and display them in the Results
screen.
Results
Area: is the area that the boundary encloses. If the boundary is not closed, the area is computed as if a line joined the
two ends.
Length: is the length of the selected boundary.
Perimeter: is the length of the selected boundary, plus any additional length between the two ends of an open
boundary.
Surface Area
[Cogo] [Surface Area]
The Surface Area routine computes the surface area of a best-fit flat plane within a selected boundary positioned at
any incline. You can also optionally compute a volume when a thickness of the surface is provided.
Note: Boundaries containing curves are not supported.
[Tap Line…]: allows you to tap an existing polyline from a map view that defines the boundary of the surface.
[To/From…]: provides selection of individual points to define the boundary of the surface. The points must be
selected in sequence around the boundary so no side of the boundary crosses another.
[Solve]: computes the area details within the selected boundary and displays them in the Results screen.
Results
Surface Area: is the area of the best-fit plane encompassed by the selected boundary. If the boundary is not closed,
the area is computed as if a straight line joined the two ends.
Thickness: is the thickness entered on the previous screen used for calculating a volume.
Volume: is the computed volume (area of plane x thickness).
Perimeter: is the perimeter length of the selected boundary, plus any additional length between the two ends of an
open boundary.
Angle of Plane: is the angle from the horizontal ground to the best-fit plane.
Residuals: Shows how well each point in the boundary fit within the computed best-fit plane. (A value of zero
represents a perfect fit.)
192