Averaging Points

The Average option allows you to average the co-ordinates for multiple occurrences of the same point.  You will be asked to indicate one of the points that you wish to average and, because of the nature of this operation, it is likely that more than one point will be found.  If this is the case, the dialog box dealing with duplicate points and features will be displayed and you should select the required point from this dialog box.

After the required point has been selected, the current model will be searched and all of the points that lie within the search radius of the indicated point and have the same code will be selected.  A dialog box similar to that shown below will then be displayed.

The average co-ordinates of the selected points will be displayed to the top right of the dialog.  The list to the top left of the dialog shows the points that have been found that are closer to the indicated point than the distance defined in the Search Radius field.  If you change the value within this field, you will then need to select the Search button to resample the points.

Initially, each point will have a green tick next to it which means that the point will be used in the averaging process.  If you wish to exclude a point, double-click on it and a red cross will replace the green tick.  A further double-click will reinstate the green tick.  If you try and double-click on the initially selected point, the first point in the list, an error beep will sound.  The details of the point currently highlighted in the list are displayed to the lower right.  Included here are offsets from the average co-ordinates.

When you click the OK button, the selected points with the green tick next to them will be deleted and replaced with a new point at the average co-ordinates.  Apart from the co-ordinates, this will be a copy of the initially indicated point, including its point number.  The Set Number check box allows you to enter a new number for the average point and, if it is ticked, the field next to it will be enabled and you can enter the new point number here.