Survey plans - developing a mesh from an imported PDF
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This is the project I mentioned above.
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@mike lucey said:
Andrew, just a shot in the dark. Have you thought about running the PDF through PDF2CAD? I am testing the latest version at the moment and find that it sometimes produces entities at different level. If you like, email / PM the file to me and I will see how it works with it.
Mike
Yeah, but not this program, Mike. Can't recall what one it was but I did trial a piece of software last year...
Thanks again for the input, Nick. I do understand your viewpoint but maybe this image might give you an idea of another need for extracting elevation data from an image / PDF.
I opened it in GIMP, saved to jpeg then imported it into SU and scaled it to suit. I then went about drawing bezier curves around each contour [very time consuming as well as fiddly as you have to make sure that the length of each contour has roughly the same segment lengths...] to an extend around the site that is necessary.
While in GIMP, I even tried selecting contours by color, creating a new layer then somehow converting to vector via inkscape but the image size is always an issue.Anyway, I hope this explains a little more about how we could work around terrain modelling for general use rather than build specific.
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If you can get the acad file, you could create that topography for that site with sandbox tools in minutes. Am I missing something?
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You're not missing anything, Nick. If the DWG is not available or in this case the PDF has come from the local council from the geo-cadastal program I'll just wanting to explore a work around.
Yes, given a DWG file of contours would take no time whatsoever... -
TGI3D has some clever mesh creation tools that can tessellate skins and all sorts of trickery.
If you can share a section you want smoothed it would help
Sent from my iPad
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Some pdf files are actually vector based and the Mac version of SU can import them Ε±as such (no need to retrace them?). I understand that you are omn Windows however...
As for softening or makingb the mesh more "regular looking", you can use Fredo's Terrain reshaper. It has features like defining final quad/tri density (i.e. downsampling a too dense mesh) etc.
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He's uploaded the pdf in question. Its a raster pdf.
If you have a better/cleaner raster you can also use illustrator or any other vector software to trace the line work for you. Its never simple nor perfect, sometimes can be helpful.
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I'd hire the local thugs and shake that DWG out of the surveyor!
Now I understand - you can't get the DWG for some reason, or it was created on something other than ACAD. I've never run into this yet.
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@rich o brien said:
TGI3D has some clever mesh creation tools that can tessellate skins and all sorts of trickery.
If you can share a section you want smoothed it would help
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About this much, ma wee lad....
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@mike lucey said:
.... or you could try it yourself as there's a 30 day trial.
Pretty similar to Bluebeam, Mike. Although I think BB looks a better all round package...
http://www.bluebeam.com/us/products/revu/Andrew
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@unknownuser said:
I'd hire the local thugs and shake that DWG out of the surveyor!
Now I understand - you can't get the DWG for some reason, or it was created on something other than ACAD. I've never run into this yet.
For some reason, Nick I do! I'd much rather have sent to me a nice clean survey DWG but no, the client always expects you to create a little magic!
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