Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 148)

User’s Manual
142
Traverse Adjust
The Traverse Adjust wizard will perform an
angle adjustment, a compass rule adjustment, or
both.
Angle Adjust
The Angle Adjust routine will compute the
angular error in a closed traverse from a known
closing angle. It will then distribute that error
equally among all of the internal angles so that
the resulting sum of the angles will equal (N-
2)·180° because the sum of the internal angles of any closed polygon
can be computed using this formula, where N is the number of
sides of the polygon.
After performing an angle adjustment, all of the points except for
the first two points will be adjusted. (The azimuth of the first leg
will remain constant.)
The closing angle provided is used to compute the angular error. It
is the angle as you occupy the closing point, aim toward the second
point and turn an angle-right to the second-to-the-last traverse
point (see illustration).
Note: An angle adjustment does not always adjust the closing
point to a location that is closer to the starting point.
Compass Rule
The Compass Rule Adjustment will adjust either a closed or an open
traverse. When adjusting a closed traverse, the error between the
closing point and the initial point is computed and distributed among
each traverse point, except the initial point resulting in a perfect
closure. When adjusting an open traverse, the error between the
final point’s actual location and specified theoretical location is
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Closing
Angle