reducing number of segments in polylines
reducing number of segments in polylines
(OP)
we recently hired out to new company to acquire topographic information on a 8000+ acre site ... some sort of new laser acquisition system .. "LiDar" or something ..... I am using the polylines in there file, or at least trying to .... miles of polylines, each containing 10's-100's of thousands of line segments .... I can not work with this, is there a an existing command \ lisp that reduces the number of line segments in a polyline... say, skips or deletes every other one





RE: reducing number of segments in polylines
htt
or:
http
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Acad2006, Terramodel
RE: reducing number of segments in polylines
also on this forum was an older topic (with the term "weeding" i could find it) a tip2171 that would not work right either
i did a search for other "weeding" lsp's, found a few, but they do not work in other ways .. most are for R13
I am using AutoCAD 2006, with EaglePoint,
lay some knowledge on me :)
RE: reducing number of segments in polylines
That's probably why tip1477 didn't accept your polylines.
Try the one at http:
RE: reducing number of segments in polylines
This is the way to contour a plot plan. Elevation lines should be smooth and not be of the form with discreete straight lines.
RE: reducing number of segments in polylines
the tip 1706 seems to get the job done, its slow but works, I found a few polylines that it will not select, with the "light" vs "heavy" in mind Ii used the 1477 and it worked on them; a little more to my liking in fact...
I do not know the deference between heavyweight" and "lightweight" polylines, can I convert them, is there an advantage one way or the other
your right chicopee, I always smooth out my contours; but doing so did not seem to reduce file size. blocking them did help, but until I like the contours flow, I will have to manipulate them a bit, these contouring programs may be technically accurate, but the "tin" seems to reach a little too far. File size is my main concern; a 170mb dwg(after purge) is proving a little hard to navigate. (and thats just the contours to be x-ref into another dwg. after that, smooth it is.
RE: reducing number of segments in polylines
RE: reducing number of segments in polylines
LiDAR is synonomous to Radar- where Radar is an acronym for Radio Detection And Ranging. LiDAR stands for Light Detection And Ranging since LiDAR uses lasers (light wavelength) and Radar uses radio waves.
RE: reducing number of segments in polylines
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Acad2006, Terramodel
RE: reducing number of segments in polylines
RE: reducing number of segments in polylines
RE: reducing number of segments in polylines
If it's a DXF file then it's a plain text file and you can write a programme (VB or anything that can manipulate text files) to identify the vertex points in the polyline and reduce them a a smaller number.
RE: reducing number of segments in polylines
the lisps given here seem to work, just not reliably. I am having one of my guys look into another program "boss" or something, it has weeding built in, along with alot of other stuff we would find useful