Merge Points
If necessary, you can merge two or more points into a single point. This might be useful if, for example, you have duplicate points in your project. When you select points to merge, you can specify which of the selected points is kept in the project as the final "merged" point. Any feature codes assigned to the points used in a merge operation are assigned to the final point.
Prerequisites:
- points to merge
To merge points:
- Select Merge Points in Survey > COGOto display the Merge Points command pane.
- Click in the Data field and then select the points you want to merge in a graphic or spreadsheet view, or in the Project Explorer.
Optionally, click the Options button to use other options to select the points.
If you want to merge more than one set of points, select all of the points that will be included in each of the merge sets based on the two additional filtering options described in the following steps. The software will simultaneously merge multiple sets of points using the same filtering options.
For example, if you need to merge three identically named points into a single merged point, and four other identically named points into a different single merged point, you could select all seven points and perform both merges at the same time, assuming the filtering options you select in the following steps pertain to both point sets.
- In the Filter Points by ID section, select an appropriate point ID filtering option:
- Identical - Merge only those selected points that have identical point IDs.
- Ignored - Merge selected points, regardless of their point ID.
- Optionally, in the Filter Points by Distance field group, select the check box and enter the distance tolerance within which you want selected points to be merged.
As you apply filtering options, calculations are automatically performed and the Selected Points list is updated with newly merged point information. It includes an expandable merged-point row for each merge operation. The merged-point row includes the final name of the merged point and the number of points available in the list to be merged. Nested beneath the merged-point row is a row for each of the points available to be included in the merge operation.
By default, the point with the highest combined horizontal and vertical quality is selected to be the final point into which the other points are merged. However, you can select a different point to be the final merged point as described in the following steps.
- To expand a merged-point row to view the points available to use in the merge operation, click the plus symbol located to the left of the row.
The horizontal and vertical quality for each point is displayed along with its distance from the final point.
- For each point you want to include in the merge operation, select the Included check box to the right of the point's ID.
By default, only the final point is selected to be included in the merge.
- Optionally, do any of the following:
- To select a different point to be used for the final merged point, select the Final Point check box for the point. The Select Points list updates automatically.
- To include or exclude all points in the list, right-click in the list and select Include All or Exclude All.
- Double-click any point row to center the point(s) in graphic views.
- To change the point ID of the newly merged point, enter a new ID in the Point ID field in the merged-point row.
Note:If the point ID for the newly merged point already exists in the project (that is, there are one or more points with the same ID that were not included in current merge operation), you will be prompted to specify whether to allow the duplicate point IDs, merge the newly merged point with the other point(s) in the project using the same ID, or cancel the merge altogether.
- Click OK to create the newly merged point(s) and close the Merge Points command pane.
Optionally, click Apply to create the newly merged point(s), clear the Merge Points command pane, and keep it open.
The points selected to be included in each merge set, with the exception of the final merged point, are no longer displayed in the Points list in the Project Explorer.
Any feature codes assigned to the points used in the merge operation are assigned to the final merged point. If a feature code was already assigned to the final point, it is displayed as the primary feature code; the feature codes from the other points are assigned as secondary feature codes.
- Select Compute Project.
You must compute the project to determine the coordinates for the final merged point(s).
- If feature codes were assigned to any of the merged points, select Process Feature Codes in GIS > Feature Definitionto process the codes as described in the Process Feature Codes topic.
This is necessary even if feature codes have already been processed in the project.
