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Home > Survey Mode > Reductions > Control Network > Reduce

Reduce

Process Control Network data from the spreadsheet.

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SurveyControlReduce

 

 

This function allows you to reduce a control network.

Mis-closures are presented for inspection and acceptance prior to the final adjustment. The final adjusted coordinates of the free points are added to the terrain database.

Procedure

  1. The Point Type Details options display.

  1. Select which points are fixed and which are free. Note that this can be adjusted.

  2. Click OK to continue.

  3. The Adjustment Settings display.

  1. Fill in the relevant data and click OK to continue.

  2. The observations are processed and the Observation Matrix Inspection displays.

  1. Click Proceed to continue with the adjustment; or Cancel to cancel the function.

  2. The network adjustment is calculated. If no solution can be found, an error message displays stating that the solution does not converge after 10 iterations. Click OK to end the function.

  3. If the network adjustment converges, the final coordinates and corrections are listed. The following message displays.

  1. Click Yes to have the provisional coordinates updated to the final calculated coordinates; or click No to retain the provisional coordinates.

  2. The free points are updated with the final coordinates, and the error ellipse parameters (a measure of the accuracy of the observations) display.