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HI,
I have been given a lidar aerial topo which is huge (160MB). I am using many of the methods perviously suggested to reduce the size but as you can see from the attachment the problem is in the zig zag nature of the polylines. This ends up creating a lot of triangles. Is there a routine around that will "straighten" the polylines as it where. Sort of draw a new line on the average position so I get a lot smaller model but a model that is still generally correct?
I Don't know it has come to me via others in the company who are struggling. I have broken it up and use data shortcuts which all helps. I will give the MAP cleanup a go and see how that works.
Use this simple vba routine
http://www.civil3d.com/index.php/2007/02/son-of-the-polylinethingy/
to create a FLT file from the polylines. you can then build a surface from this external FLT file, keeping your dwg small!
Thanks to both suggestions. I will try the flt thing although I can create a surface in a separate drawing and data shortcut it in keeping my working drawing size down too. It will be interesting to see which method produces the best result.
The file has been sent to me purely as an acad plan with polylines (the contours) with a Z value. I have tried the mapclean which helps but I need to be pretty radical to fix some areas which of course badly distorts others.
Hi,
May I suggest that you try and export your Surface to a LandXML-file.
Then create a new dwg and import that LandXML. It reduces the size of the data in the drawing.
This is really where we're trying to improve the future releases...
![Autodesk Design & Make Report](https://forums.autodesk.com/t5/image/serverpage/image-id/1350519iCB55845EBFC43016/image-size/large?v=v2&px=999" "Autodesk Design & Make Report")