Merge
Feature Description
In practical applications, you may need to merge objects. For example, if you want to merge the three provinces of Heilongjiang, Jilin, and Liaoning into the Northeast region on a national administrative division map, you can select the three region objects representing these provinces and use the merge operation to combine them into the Northeast region. The merge operation supports region objects or line objects. .
Various special cases may occur during the merge operation. These cases are explained below.
- The current layer is a region layer
- If the regions participating in the object operation intersect at a point, these region objects are merged into one complex region object (as shown below, resulting in a complex region object with two sub-objects).
- If the regions participating in the object operation intersect along a line, the adjacent boundaries between these region objects will disappear, merging into one simple region object.
- If the regions participating in the object operation intersect as overlapping regions, they are recombined into one simple region object.
- If the regions participating in the object operation do not intersect and are not adjacent to each other, a complex region object will be generated after merging (as shown below, resulting in a complex region object with three sub-objects).
- If the regions participating in the object operation intersect at a point, these region objects are merged into one complex region object (as shown below, resulting in a complex region object with two sub-objects).
- The current layer is a CAD layer
- In a CAD layer, after line objects, curve objects, elliptic arcs, and arcs participate in the operation, the type of the new object generated is a line object; after region objects, rectangles, circle objects, and tilted ellipses participate in the operation, the type of the new object generated is a region object.
- Cross-layer merge
- During a cross-layer merge, the selected objects from other layers will be merged with the objects in the currently editable layer. After the operation, only the objects in the currently editable layer change; objects in other layers remain unchanged. When multi-layer editing is enabled, you can choose in the Merge window which object to retain. Supports setting whether to delete the unselected objects from the editable layer.
Functional Entrance
- Edit Data tab -> Feature Editing group -> General editing -> Group and Ungroup -> Merge
- In the map -> context menu -> Merge button.
Operational Steps
- With the layer editable, select two or multiple objects.
- In the Edit Data tab's General editing drop-down menu, click the Merge button in the Group and Ungroup group. The Merge dialog box pops up. Then set the following parameters in the dialog:
- Editable Layer: Displays the layer to be edited. Cannot be manually modified; determined by the selected geometry to save.
- Save Geometry: In the Save Geometry input box drop-down, select the object to retain. Selected objects will be highlighted in the map.
- Save the properties of an object: The attributes of the object selected in Save Geometry are displayed here, which will also be the attributes of the merged object. Supports manually modifying field values.
- Delete Source Object: Only available when merging objects across layers. Used to set whether to delete objects from non-currently editable layers during cross-layer merging. Unchecked by default. If checked, objects from non-currently editable layers will be automatically deleted after merging; if unchecked, objects from non-currently editable layers will be retained.
- After setting the above parameters, click the OK button to complete the object merge.
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