To compute an averaged position

You can compute and store the average position for the same point if it has been measured more than once.

To 'average' the observations for a point, two or more angles-only observations from two different known points must be measured and stored with the same point name. Points stored as control points cannot be used to compute an average.

To automatically average duplicate points, enable Auto average in the Duplicate point tolerance section of the survey style.

1. Tap and select Cogo / Compute average.

2. Select the Point name.

   Trimble Access averages all positions in the job with the same name, except control points. Once computed, the average point grid position appears, along with the standard errors for each ordinate.

   Any Mean Turned Angle (MTA) observed to the point is ignored and the original observations are used to compute the average position.

3. To include or exclude specific positions from the average computation, tap Details.

   The residuals from the average position to each individual position are shown.

   The Details softkey appears only if there are more than two positions for the point.

4. To change the averaging method, tap Options. The default method is Weighted.

   For more information on the available options and how the averaging is calculated, see Averaging.

5. Tap Store.

   If an averaged position for the point already exists in the database, the existing point is automatically deleted when the new average position is stored.

An averaged position is not automatically updated if the positions used to compute the average are changed. For example, if the calibration is updated, if observations are transformed or deleted, or if new observations of the same name are added, recompute the averaged position.