Run a Network Adjustment Report
After you adjust a network, generate a Adjust Network Report to review successful adjustment statistics, such as the adjusted grid and geodetic coordinates, adjusted observations, and covariance terms, You can also use the report to review error ellipse and residual details to determine which vectors need to be disabled, how control points should be fixed, and which settings may need to be changed before re-adjusting the network.
Note: This report is also one of several reports with a predefined template that you can modify to create a new custom report. See below.
To run a Network Adjustment Report:
- Click the Network Adjustment Report icon on the Network Adjustment command pane toolbar.
- Select Reports > Report Options in the Quick Access Toolbarand then select Network Adjustment Report.
The Network Adjustment Report displays in your default Web browser. Click any link in the left pane to view a specific section.
Report Components |
|
Adjustment Settings |
This shows the set-up error values and covariance display formats as set in Project Settings. |
Adjustment Statistics |
This summarizes the number of iterations it took to adjust the network, and why the adjustment passed or failed. Reference factor indicates how much adjustment was necessary, whether the random errors in the observations are acceptable, and if they match the estimated standard errors for those observations. The reference factor should be about equal to 1.0. This value lets you know how well the adjustment a priori (pre-adjustment) errors are matching the a posteriori (post-adjustment) errors. |
Control Coordinate Comparisons |
This section shows the delta values (control coordinates minus adjusted coordinates) for all of the control coordinates. |
Constraints |
These sections show the specified constraints used for control points, azimuths/bearings, and horizontal distances in the network adjustment. |
Adjusted Grid Coordinates |
This section shows the adjusted northing, easting, elevation, and computed standard errors for each grid point used. The Fixed column indicates which point coordinates were fixed (constrained) during network adjustment. |
Adjusted Geodetic Coordinates |
This shows the adjusted latitude, longitude, and height values and coordinate errors. The Fixed column indicates which point coordinates were fixed (constrained) during network adjustment. |
Error Ellipse Components |
This section shows the magnitude and direction of the point errors. |
Adjusted Observations |
These sections display the adjusted observation components, including the standard error, residual (how much of an adjustment had to be made) and standardized residual for adjusted GNSS, total station, and leveling observations. The observations are sorted to display the worst standardized residual at the top. Note: Observations with a standardized residual that fails the Tau criteria display in red. These observations are outliers. Examine these to justify keeping them in the network. |
Histogram of Standardized Residuals |
This section provides a quick visual reference showing the distribution of standardized (normalized) adjustment residuals displayed against a normal distribution curve line for comparison. The graph includes two vertical boundary lines representing the critical tau value so you can easily identify the number and distribution of failing observations. Both the critical tau value and the number of failing observations are also displayed as numerical values above the graph. |
Covariance Terms |
This shows the relative error in any pair of points in the project. The a-posteriori error and the horizontal (2D) and 3D precision are shown for each observation. The precision can be shown as a ratio or as ppm, depending on your project settings. |
To change report settings:
- Do one of the following:
- Click the Report Options icon on the Network Adjustment Report command pane's toolbar.
- Select Reports > Report Options in the Quick Access Toolbar.
- Select Network Adjustment in the list.
- Expand sections and specify output settings in the Settings group as needed.
- Click if you want to customize additional reports, or to close the command pane.
To create a custom Network Adjustment Report from a template:
If you want the report to include different data or a different layout, follow the steps in Create and Edit Customized Report Templates.