The points entering the network adjustment can have different features, depending on the way they will participate in the adjustment. The features are to be set independently for the position and vertical adjustments.
Permanently marked points
The permanently marked points have fixed coordinates which won't be changed by the adjustment. After the network adjustment, the resulting permanently marked points will have the same coordinates as they had at the input.
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Neither the distances nor directions should be measured between the permanently marked points. The measurements between the permanently marked points do not affect the resulting coordinates, but they do negatively affect the mean errors. |
Permanently marked X, Permanently marked Y
For the points with this feature, the X and Y coordinates are not changed by the adjustment.
Free points
Free points are all the common points of the net, whose coordinates should be adjusted. The coordinates of all the free points will be changed by the adjustment. If the network contains only this type of points, the network will be placed at the same time using the Helmert transformation on all the network points.
Permanently marked bearing
This feature is used in connection with the permanently marked points. If one of the points has the feature Permanently marked point and one Permanently marked bearing, then after adjustment the coordinates of the permanently marked point and the bearing from the permanently marked point to the point with the feature Permanently marked bearing will be maintained.
Helmert
If, after the adjustment, you want to place the network using the Helmert transformation only on selected points from the net, mark the selected points with the feature Helmert and the others with the feature Free.
Permanently marked points
The permanently marked points have a fixed height which won't be changed by the adjustment. After the network adjustment, the resulting permanently marked points will have the same height as they had at the input.
Free points
Free points are all the common points of the network whose heights should be adjusted. The height of all the free points will be changed after the adjustment. If the network contains only this type of points, the network will be vertically placed using the Helmert transformation on all the network points at the same time.
Helmert
If, after the adjustment, you want to vertically place the network using the Helmert transformation only on selected points of the net, mark the heights of the selected points with the feature Helmert and the heights of the other points with the feature Free.
If you want to change the adjustment features for some points, follow the steps below:
Select the point on the approximate coordinate list.
Change the point feature for the position and/or vertical adjustment. You can also change any other data.
Press the button (Add). If the added point has the same number as a point existing on the approximate coordinate list, it won't be added to the list, but only adjusted according to the entered data.
If you want to change the characteristics of more points at once, follow the steps below:
Choose the required points from the approximate coordinate list. You can use the keys <Shift> and <Ctrl> for the selection, as usual in Windows.
If more points on the list are selected, only the adjustment features will be displayed in the input boxes (other features cant be batch changed). Change the point feature for the position and/or vertical adjustment. If you don't want to change one of the features, leave it undetermined ([-]).
Press the button (Add). The features for adjusting will be changed on the list.