Delete duplicate objects

Removes unnecessary objects which geometry is redundant by deleting duplicates and combining line and arc segments that overlap. For example:

• Duplicate copies of objects are deleted
• An arc drawn directly over a portion of a circle is deleted.
• Two lines drawn at the same angle so that they partially overlap are combined to form a single line.
• A duplicate line and/or arc segments within polylines are removed.

To delete duplicate objects

1. Do one of the following:
   • Choose Express > Modify > Delete duplicate objects.
   • Type overkill and then press Enter.
2. After having selected objects in the overkill dialog box, set options for deleting duplicate objects and then confirm with OK.

• Object comparison settings: the settings of this section of the dialog box control how OVERKILL compares objects.
  
• • Ignore options: all the options under Ignore have similar behaviour. For example, when the Ignore Layers option is selected, OVERKILL ignores object layers when comparing objects. Thus, two overlapping objects that reside on different layers may be considered equivalent. This option allows objects on different layers that overlap to be deleted or modified, to resolve duplication and/or overlap.
  • Numeric fuzz: the Numeric Fuzz value allows you to set the precision with which OVERKILL makes numeric comparisons. If this value is 0, two objects being compared must match before OVERKILL deletes or modifies one of them. On the other hand, if the fuzz value is higher than 0, two objects being compared do not have to match one of them to be deleted or modified. The fuzz value works in this way for other numeric comparisons such as X, Y and Z coordinate comparisons, as well as object comparisons involving scale, height, width, and so on.
• Lines, Arcs and Plines: the settings of this section of the dialog concern how overkill deals with lines, arcs and plines.
• • Plines Optimize segments within plines. When the Plines option is selected, overkill checks individual line and arc segments within selected plines and removes any duplicate or unnecessary vertices. Also, if a pline segment duplicates a line or an arc object, one of them is deleted. If this option is not selected, overkill examines each pline as a single unit; that is, it deletes a pline only if it is a duplicate of another pline.
  • Overlap Combine co-linear objects that partially overlap. The Overlap option controls how overkill handles objects that partially overlap one another. When this option is selected, objects that overlap are combined to form a single object. Otherwise, if this option is not selected, overkill does not change partially overlapping objects. For example, you have a horizontal line and another horizontal line drawn from the midpoint of the first line to a point beyond the end of the first line. (See the following illustration) The second line partially overlaps the first line. If the Overlap option is selected, overkill combines the two lines to form a single line that extends from the leftmost point to the rightmost point. If the Overlap option is not selected, no change is made. (The red X marks show the endpoints of the first line and the blue X marks show the endpoints of the second line.)
  • End to end Combine co-linear objects when aligned end to end. Using this option, you can combine co-linear objects that have common endpoints. The following illustration shows how overkill works with the End to End option: the red X marks show the endpoints of the first line and arc. The blue X marks show the endpoints of the second line and arc.

How do I...

Move, Copy, Rotate

Extended clip

Flatten object

Multiple copy

Extended offset