Function Description

The Intersection operation obtains the common parts of two or multiple objects. By performing an intersection operation on the overlapping area of two or more objects with the same geometry type, a new object is created. The common area of the multiple objects is retained, while the other parts are deleted. Please note that intersection operations are not supported between lines.

• If the pairwise intersection of the polygons participating in the object operation is not an empty set, a simple object representing the pairwise intersecting parts will be generated after the intersection.

  Before Intersection	After Intersection

• If the pairwise intersection of the polygons participating in the object operation is empty, all source objects will be deleted after the intersection, and no new object will be generated.

  As shown in the figure above, the pairwise intersection of the participating polygons is empty; after the intersection, the source objects will be deleted.

• Description of the attributes for the generated new object. You need to set which object's attributes to retain and what operation to perform on the field values in the attribute dialog. For an explanation of the Intersection Property Processing dialog and its parameters, please refer to the Property Processing Dialog Description.
• In CAD layers, when polygon objects, rectangles, circle objects, or oblique ellipse objects participate in the operation, the type of the generated new object will be a polygon object.
• Cross-layer Intersection. Selected objects from other layers will perform intersection operations with objects in the current editable layer. After the operation, only objects in the current editable layer change; objects in other layers remain unchanged. For multi-layer editing, intersection operations are also performed on objects within the specified editable layers.

Function Entrances

• Edit Data Tab -> Feature Editing Group -> Face editing -> Face relationship -> Intersection

Operation Instructions

1. With the layer in an editable state, select two or multiple objects.
2. Click the Intersection button through the entrance mentioned above to pop up the Intersection dialog box.
3. In the dialog box, set the object whose attributes to retain. For an explanation of the Intersection Property Processing dialog and its parameters, please refer to the Property Processing Dialog Description.