Ong Tze Lin (tzelin++at++nuno.singapore.sgi.com)
Sun, 3 May 1998 18:10:43 -0700
Thanks for all your suggestions. I've looked into all your suggested URLs. I
have also found ESRI has a package called ArcTIN which sounds like what I need.
Cheers,
tzelin
On Apr 28, 12:44pm, Lee Willis wrote:
> Subject: Re: Extracting terrain data from dxf
> If you want a role-your-own solution, *and* you have a decent TIN library:
>
> 1) Define the contours as edges in the TIN.
> 2) Tesselate the TIN
> 3) Interpolate the TIN back into a DEM.
>
> There are a number of freely distributable TIN libraries on the net. See
>
> http://www.cs.cmu.edu/~garland/multires/software.html
>
> for some of them. (Not everything listed there is suitable)
>
> (Any good vector GIS should also be able to do this)
>
> ------------------------------
> Lee Willis Virtual Landscape Dermatologist
>
> lwillis++at++terrex.com TERREX
>
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>-- End of excerpt from Lee Willis
On Apr 28, 1:15pm, Alejandro Saez wrote:
> Subject: Re: Extracting terrain data from dxf
>
> Both tasks can be done with an GIS software. Some GIS (arc-info being one of
> them, I think, I'm not sure) can read dxf vector data and write DFAD culture
> data. Also, most vector/raster GISs can generate an image DEM file from
contour
> maps (TNT mips is one of them, I've tried it). The problem is that by
> generating an image file you loose geographic location information.
>
> Hope this helps
>
> --
> ------------------------------------------------------------------------
> Alejandro Saez
> Software Engineer
> Silicon Chile S.A.
> Avda. Andres Bello 2777, Of. 602
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> Fax: +56 (2) 203 3370 Chile
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>-- End of excerpt from Alejandro Saez
> ----------
> > From: Ong Tze Lin <tzelin++at++nuno.singapore.sgi.com>
> > To: info-performer++at++sgi.com
> > Subject: Extracting terrain data from dxf
> > Date: Tuesday, April 28, 1998 8:34 AM
> >
> > Hi all,
> >
> > I'm wondering how to get Dted or other terrain info
> > out of a dxf file containing contour lines.
> >
> > Is there any software out there that will do that?
> > Right now I'm faced with having to translate
> > the data into inventor, and sampling the points
> > in the data field at appropriate intervals to construct
> > my own ded file.
> >
> > Also I'm looking into shading the contour intervals
> > and using the MultiGen utility image2ded to get
> > a terrain mesh.
> >
> > But if there are any tools out there which will make
> > my life easier, I'll use them!
> >
> > Thanks,
> >
> > Cheers,
> > tzelin
> >
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--
Ong Tze Lin Technical Consultant
Silicon Graphics ASEAN HQ High-Performance Computer Graphics
89 Science Park Dr. #03-03 to 06
The Rutherford, Singapore 118261 Tel: (065)777 3088 Fax: (065)779 3650
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