To Find Existing Points

This calculation step is optional. You can include existing detail points to the adjustment process. For example, to improve the reliability of detail points that are already stored in the database.

To reference points that are stored in documents that are not part of the workspace, see Managing additional detailpoints.

Note:

The existing point feature classes must have the following default attributes: TB_POINTNUMBER, TB_ACCURACY_POSITION, TB_ACCURACY_HEIGHT, TB_RELIABILITY_POSITION, TB_POSITION_RELIABLE, TB_RELIABILITY_HEIGHT, TB_HEIGHT_RELIABLE. See also Storing the Adjustment Results.

Step 6, Find Existing Points, searches existing detail points, and adds them to the adjustment process, depending on its reliability. A point is reliable, if the attributes <point feature class>.TB_POSITION_RELIABLE or <point feature class>.TB_HEIGHT_RELIABLE are set to True.

Note:

The reliability attribute can either be 1 or 0. In the Global Settings, you specify which value indicates True or False. For example, 1 = True, and 0 = False. See also Global Survey Settings.

• Reliable detail points are added as fix points.
• Non-reliable detail points are added as moveable points, that means that they are added as coordinate observation with a standard deviation. The standard deviation is stored in the attributes <point feature class>.TB_ACCURACY_POSITION, and <point feature class>.TB_ACCURACY_HEIGHT.

To define the search rules

1. Under Configuration, click the Manage Field Code List link.
2. In the Manage Field Code List dialog box, select the field code list.
3. Under Field Code, click the Calculation tab.
4. On the Calculation tab, define the search rules. See also Settings to Find Existing Points.

To find existing detail points

1. In step 6, Find Existing Points, click Find.
2. After the search has finished, click the Show Coordinates link to analyze the search result. In the Coordinates dialog box, the Planimetry Moveable Point tab, displays the existing detail points that will be included in the adjustment calculation.

Note:

In the Coordinate dialog box, you can add moveable points manually. See Moveable Points.

If the results are all right, click Next to continue with step 7, Calculate Adjustment.