Levels Curvers

[Anonymous]

Hello Friends,

I have a file with topography that has the level curves spaced at 5m. I wanted to get a file space 30 meters, which means that I have to find a way to felete all lines that have height "X05,X15,X20 and X25".

Do you guy have any idea how I could do that ?

I am using AutoCAD 2012.

Thanks for any information. 

[BrianBenton]

Can you share the file or a sketch or diagram of what it is you have and one of what you want to do? I'm not quite clear on what you are trying to accomplish

[Kent1Cooper]

If they are drawn at those elevations in 3D, that is, they have non-zero Z coordinates, it should be pretty easy with the use of a (rem) function to divide each one's elevation by 30, and if there's any remainder, eliminate it.  Is that the case?  Very quickly, in the case of LWPolylines with elevation [the (assoc 38) value], and assuming your drawing unit is one meter [minimally tested]:

(setq ss (ssget)) ; [or the routine could find them, if distinguishable in some way(s)]
(repeat (setq n (sslength ss))
  (setq lin (ssname ss (setq n (1- n))))
  (if (not (equal (rem (cdr (assoc 38 (entget lin))) 30.0) 0.0 1e-4))
    (entdel lin)
  )
)

If the drawing unit is something else, change the 30.0 accordingly, and if necessary, change the 1e-4 precision.

[ara_neresesian]

HI

i think using "Quick select " will help you

 

for each elevation just change z value 5 10 15 20 25 

but for sure your dwg file must be 3d file

otherwise you have to do it manually  .

please  attach your file for better solution . 

good luck