topic Re: Not closed polyline in AutoCAD Forum

Not closed polyline

mohamad_nabaviYLCU2 — Thu, 05 Oct 2023 14:56:51 GMT

Hi all,

I have this strange polyline and I want to measure the surface, but I cannot, I tried several things, but it shows me that it's not closed,

the line is created by another software and originally it was a 3dpolyline,

I just need the surface and of course the solution for future reference,

I attached the file.

Thanks

Betreff: Not closed polyline

cadffm — Thu, 05 Oct 2023 15:04:25 GMT

'CLOSED' is a polyline property like color or layer..

it draws a line between the first and the last vertex of you polyline..

YOUR Polyline vertex1 and vertex4195(the last one) are on the same place,

so when you set "closed" to Yes, you won't see any difference.

Simple Sample:

A simple rectangle can be draw by a polyline with 4 vertex, the RECTANG command creates a rectangle this way.

The 4th line between the first and last vertex, is displaying because of the CLOSED property = Yes.

Turn it OFF to see the gab.

Re: Not closed polyline

Kent1Cooper — Thu, 05 Oct 2023 15:10:33 GMT

If by "measure" you mean you want to know its area, you can do that with the AREA command and its Object option. Since the thing starts and ends at the same place, that gives the same result whether or not you force it to be Closed in Properties.

EDIT: I assume the Area slot in Properties is missing because it has the same problem with a Polyline of over 4000 vertices that the LIST command does. Try LIST and it will tell you to "please use AREA command for huge polylines."

Betreff: Not closed polyline

mohamad_nabaviYLCU2 — Thu, 05 Oct 2023 15:11:24 GMT

Very good explained