Saturday, 23 May 2015

Civil 3D Survey : Info : Traverse adjustments

Traverse adjustment can be done through...

...Network adjustment (least squares)
...Traverse analysis

When entering traverse analysis there is a critical option for the user to select to Update survey database or not.

If checked then...

Adjusted survey points are ALWAYS set also as control points in network's control point list with a different icon next to them than the non adjusted ones.

Adjusted point coordinates both in network control points and survey points tables are identical.
Obviously the coordinates for those points are different when viewed through observation table as observations. Adjustment is only for the station point and its backsight azimuth. Foresight angle and distance are unadjusted. They might also different than before adjusting if station was not a control point.

Right clicking on Network control points there is an option to Reset adjusted coordinates. Doing this coordinates revert to original and so on for the azimuths.

If not reset then it is not possible to recalculate Network or Traverse that includes those points.

If you want to see the drawing of the network or traverse then you must select Insert into the drawing.

You can set the civil 3d custom (network named) object to what ever layer you want. If you readjust then updated drawing is in the same layer.
If least squares are selected then the ellipses are also drawn with the network or traverse.

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