How to remove double lines using AutoCAD

AutoCAD has a great feature for removing doubled up or overlapping lines. Choose Delete Duplicate Objects from the Modify menu or type Overkill the command line.

MODIFY MENU USERS:

Select all the objects in your drawing or just the objects you wish to combine. Then from the Modify menu select Delete Duplicate Objects.

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The following dialog box opens.

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Ensure the Optimize polyline segments option is checked. If you have "do not break polylines" checked the feature will not break native shapes such as square etc. Uncheck this option to ensure all the duplicates are removed.

The Object Difference Tolerance box determines how exact two objects must be to be considered duplicates. The default, 0.000001, deletes almost exact objects. You can change this to 0, to delete only objects that are exactly on top of each other.

The "Optimize polyline segments" check box, on by default, removes duplicate line or arc segments within a polyline, or lines and arcs that overlap a polyline. If you uncheck this, the command only removes duplicates of entire polylines.

The "Combine co-linear objects that overlap" check box, also on by default, combines objects that partially overlap into one object.

The "Combine co-linear that are end-to-end" check box combines objects that don’t overlap, but are end to end, such as two co-linear lines with one common endpoint.

COMMAND LINE USERS:

The OVERKILL command, part of Express Tools, can help. This command deletes duplicate objects and goes further to combine overlapping lines and arcs.

When you start the command, the next prompt is Select objects: and you can type all and press Enter to apply the command to the entire drawing. Then press Enter again to end object selection.

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To keep the default settings, just click OK. 

You can specify lots of settings to control the process. For example, you can check the Ignore LAYERS check box to delete overlapping lines, even if they are on different layers.

The Object Difference Tolerance box determines how exact two objects must be to be considered duplicates. The default, 0.000001, deletes almost exact objects. You can change this to 0, to delete only objects that are exactly on top of each other.

The "Optimize polyline segments" check box, on by default, removes duplicate line or arc segments within a polyline, or lines and arcs that overlap a polyline. If you uncheck this, the command only removes duplicates of entire polylines.

The "Combine co-linear objects that overlap" check box, also on by default, combines objects that partially overlap into one object.

The "Combine co-linear that are end-to-end" check box combines objects that don’t overlap, but are end to end, such as two co-linear lines with one common endpoint.

Click OK to execute the command.

 

 

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1 Comments

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    Jackson wiebe

    Great tip Dan.You should also mention that user should first use the explode tool. If you have overlapping lines in an array or object the overkill command wont pick them up. EXPLODE everything (might need multiple passes) until it is bare lines then use OVERKILL.

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