Exercise 3: Performing Least Squares Analysis - Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual

All sides shots from adjusted setups within the traverse are updated.
All figures that reference points within the traverse are updated.
Any of the above data that is displayed in the current drawing is also
updated.
Because you will use this survey database to perform other analyses in
later exercises, you will not reprocess the linework.
7 Click Cancel.
8 In Toolspace, on the Survey tab, select the Control Points collection.
Right-click. Click Reset Adjusted Coordinates.
This action resets the adjusted coordinates, enabling you to continue
with the next analysis.
To continue this tutorial, go to
(page 152).

Exercise 3: Performing Least Squares Analysis

In this exercise, you will reduce the survey information using the least squares
adjustment method.
The least squares method calculates the most probable value for each
observation. The values are calculated by adjusting each of the observations
simultaneously so that the sum of the squares of the residuals (the difference
between measured and adjusted observations) is at a minimum.
For more information, see the AutoCAD Civil 3D Help topic Least Squares
Analysis.
This exercise continues from
150).
Modify the survey network style
NOTE This exercise uses Survey-3.dwg with the modifications you made in the
previous exercise.
1 In Toolspace, on the Settings tab, expand the Survey
collection.
This collection contains the existing network styles in the drawing.
152 | Chapter 6 Survey Tutorials
Exercise 3: Performing Least Squares Analysis
Exercise 2: Performing Traverse Analysis (page
Network Styles