AutoCAD Map 3D :: Creating An Image From Polylines

Apr 7, 2011

The Project: Determining erosion setback elevations for hydroelectric requirements: increased water levels due to flooding.

I'm trying to create a DEM from contour polylines that were downloaded from a Government website. 

The 2d shp file was imported and since the area in question is relatively small I've set the contour lines to the elevations they represent by hand.  Now I'm trying to create a pseudo DEM from them.  I need to create a 3d surface and then from there determine a rough idea of an erosion setback at a certain elevation.

Basically, the contour lines are set to 710', 725' and 750', the elevation setbacks are around 720' and 730'.  Is there a way to create a surface between the three elevations and then show single solid polygons at the 720' and 730' elevations?  And further is there a way to create a polyline at those two elevations to show an approximate setback on a sketch of the area?

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Jul 10, 2012

I have a network of 3d polylines, how can I convert this to a 3d object? In 3ds max I can use a surface modifier to convert it to 3D. Is there a workflow inside of AutoCAD?

3d polyline network.jpg

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Jan 4, 2012

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Example: 

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Jan 2, 2014

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To put things into prospective, here is an example:

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this.JPG

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Nov 27, 2012

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Jun 29, 2012

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When I use the JPGOUT (or PNGOUT or BMPOUT or TIFOUT) command I can select all of the objects and viewport; there is no problem creating the file.  But when I open up the raster image, only the viewport outline and objects in paperspace have come accross; the viewport appears empty. 

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Jan 4, 2012

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Nov 22, 2012

Over the past year I have been working on quickly generating vertical cross sections through 2D lines. I have exhausted all of my connections with fellow AutoCAD users and I still haven't found an efficient solution.

The material I'm working with is a bunch of polylines that kind of resemble branching tree roots from dozens of trees. The polylines sprout from seed points and then branch and cross each other as they move down. I need to generate many vertical sections through the lines. Since the material is composed of lines a slice along a plane would only generate points. I need to take a slice of a volume of lines so that the paths are preserved.

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The ideal tool for efficiency and accuracy would be Section Line. I could create a section line, convert it to a volume, and generate a 3D section with the option to save the section to a new file. The problem with this is that the section tool only works on solid 3D objects. I have considered sweeping a small diameter circle along each polyline to give them volume, but this would take days to weeks of work.

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I am using AutoCAD 2013.

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Feb 21, 2013

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Bank.dwg

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I have this

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[code].....

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Jun 9, 2011

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Dec 7, 2011

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<CommandMethod(
"testpline")> _
Public
Subtestpline()
'' Get the current document and database, and start a transactionDim acDoc AsDocument = Application.DocumentManager.MdiActiveDocument
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Aug 16, 2011

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Sep 9, 2011

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