How can I delete the inner lines of the mesh?

[danismanm]

Hi! I had roads as mesh in my dwg file. I applied the FLATTEN command. Now I have all the lines one by one. But I need to delete the lines inside the roads, except for its outer lines. The SELECTSIMILAR command does not work because the inside lines and outside lines are in the same layer. How can I have only the outer lines of the roads?

[pendean]

manually I suspect based on your descriptions alone: can you share your actual DWG file?

[danismanm]

thanks. I edited and added screenshot and dwg.

[pendean]

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@danismanm wrote:

thanks. I edited and added screenshot and dwg.

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Thanks for the file: other than OVERKILL command getting rid of ~180000 duplicates, I see no other easy automated method to remove the other excess lines from your DWG file. Sorry.

[danismanm]

Is there any step I can take before FLATTEN the mesh?

[pendean]

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@danismanm wrote:

Is there any step I can take before FLATTEN the mesh?

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Can you share your original DWG (mesh?) before flattening and exploding etc.?

[danismanm]

Here is the original mesh. Thanks a lot for your help.