Extract XYZ Circle Created from Multiple Polyline

[aidilfitriansyahhV7KXB]

Hi All,

How to Extract XYZ Circle Created from a lot of Polyline? 

[Patchy]

Put point nodes on them and use dataextraction?

Attach your .dwg for a test.

[ВeekeeCZ]

Draw a real circle using 3 points option over it.

[Kent1Cooper]

If those are equally spaced vertices, and it's all line segments, you can use the PolygonToCircle.lsp with its Pg2C command, >here<.  That requires pretty accurate regularity, so if there are variations in segment length or something that cause Pg2C to not work, there are other threads around with conversions, such as >this<.  [One of the suggestions on that thread automates the 3-point Circle idea suggested by @ВeekeeCZ in Message 3 here.]

If they're arc segments, try CirclePolylineSwap.lsp with its P2C command, >here<.  [It predates the PolygonToCircle routine, which is why I put the 'g' for Polygon into the latter's command name.]