Merge
Feature Description
In practical applications, we may need to merge features. For example: When you want to combine Heilongjiang, Jilin, and Liaoning provinces into Northeast China on a national administrative map, you can select these three region features and use the merge operation to create the Northeast region. This function supports merging region or line features.
Various special scenarios may occur during merging operations. The following sections explain these cases in detail.
- Current layer is region layer
- If participating regions intersect at points, they will be merged into a complex region object (as shown below, creating a complex region with two sub-objects).
- If participating regions intersect along lines, their adjacent edges will disappear and merge into a simple region object.
- If participating regions overlap in areas, they will be recombined into a simple region object.
- If participating regions are non-adjacent and non-intersecting, merging will create a complex region object (as shown below, creating a complex region with three sub-objects).
- If participating regions intersect at points, they will be merged into a complex region object (as shown below, creating a complex region with two sub-objects).
- Current layer is composite layer
- In CAD layers: Line objects, curve objects, elliptic arcs, and arcs will generate new line objects after merging; Region objects, rectangles, circles, and tilted ellipses will generate new region objects.
- Cross-layer merging
- During cross-layer merging, selected objects from other layers will be merged with objects in the current editable layer. Only objects in the current editable layer will change, while objects in other layers remain unchanged. When multi-layer editing is enabled, use the Merge dialog to select which editable layer's objects to merge. Supports setting whether to delete unselected objects from the editable layer.
Feature Entry
- Features Tab->Feature Editing Group->Merge.
- Map context menu->Merge button.
Steps
- With the layer editable, select two or more objects.
- Click Merge in the Gallery control of Feature Editing group under Features tab to open the Merge dialog.
- In the dialog, configure objects to retain. For details about the attribute processing dialog and parameters, see Attribute Processing Dialog Description.
- Click OK to complete merging.
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