Control Net Adjustment

Adjustment Main Menu: 
  • Setup: Changing and Fixing pre Adjust parameters and constants (Like DATUM, reporting defaults etc.).
  
  • Least Square: Linear-Angular Strict adjustment using the Method of Minimal Least Squares of  Residuals. The algorithm works in several stages:

    • Filtering Participant Points. 
    Averaging Measurements.
    Observation's Weights. 
    Pre Adjustment Table. 
    Reporting Results.
    Automatic Calculating of all the Details in Project.
    • Polygonometry: Strict junctions adjustment in net of Traverses web, and then reporting every polygon enclosures according to the Compass Rule Method (Already known as Bowditch Method). The Polygonometry Method is very useful for cadastre in urban areas where many low order traverses are used for the settlement. The program automatically eliminates the junctions from the traverse's net and also allow a net without any azimuth reference, (in this case the calculations are taking place in two stages, the first one in local coordinates system and then a transformation is being used).

    Filtered Point's List.

    The Adjustment Module gets scrambled raw data in Field - Book file format. 
    In the first stage, which also can be called Pre Adjustment preparations, the program search for "known points" (control points with known and fixed coordinates), unknown traverse points and detail points. 
    The algorithm distinguish between the planimetric and Altimetric control net. 
    The adjustment process work on both networks.

    Observation's Accuracy's.

    After collecting all the observations which participants in the process of adjustment the repetitive measurements are averaged and listed in the "accuracy table" for defining the weights. 
    A special page for every type of data: 
    Directions- Theodolite readings. 
    Distances- Slope ranges or horizontal distances. 
    Azimuths- Bearings or Azimuths which measured with gyrocompass or calculated from GPS vectors. 
    Coordinates Differences- Planimetric components of GPS vectors. 
    Elevations Differences- geometric or trigonometric measurements of Heights differences. 
    The user can edit and change a specific accuracy or determine fixed accuracy for all of the observations in that page.

    Pre Adjustment Summation Table.

    Summary of the planimetric (coordinates) and altimetric (elevations) elements.
    The user can choose whether or not he wants to calculate precision estimations.

    Reporting Directions Deviations.

    The process in the adjustment module combined from 14 steps. 
    The program advance from one step to the other automatically. 
    A red blinking light signs the current step being execute. A green circle stands for successfully passed steps. 
    The "output results" step which is currently being display load a form with 8 pages: 
    'Directions', 'Distances', 'Azimuths', 'Coordinates-Differences', 'Elevations-Differences'; for observations deviations; 
    'X,Y Accuracies', 'Heights Accuracies' and 'Points Results'; for precision summation.

    Reporting Distances Deviations.


    Reports can also be sent to the printer and printed in two types of format: Grid format or Page format. 
    Here we can see an example of the distances corrections report.

    Planimetric Net Statistics.

    Adjusted coordinates precision table, with the relevant elements from the varianc-covariance matrix.

     
     
     
     
     
     
     
     

    Full Reports Form.
    We can create 16 different reports 
    according to the setup parameters. 
    The reports divided to 3 categories: 
    1. Results- Statistics and accuracies.
    2. Process- Pre adjustment process.
    3. Setup- Initial values & parameters.


     
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