[Manifold-l] 3D with Manifold

[JBurn_GIS]

We have found draping information in Manifold (such as imagery) to be both easy and quality wise fine.  We use it all the time for projects.  The only thing that we have found that must be taken into account is the resolution of the surface and of the image to be draped.  The end result will be that of the lower resolution component.  So, you might have 30cm imagery, but if your surface is 1m, then your overall result is a 1m version of your initial 30cm image.  This is easily rectified though by resampling your surface to be at the same resolution as your image (or vice versa) or when creating your surface, just set the parameters to the same as your image.

As for adding more then one image at a time, yes you can do this.  You just need to either adjust the transparency of the overlays, or make sure that the one has "invisible" areas where you want the other to show through depending on what sort of effect you're after and what you're trying to show.

Hope that helps a bit.
Cheers.
---------------
James Burn BSc, GIS(pg), AScT
  ----- Original Message ----- 
  From: Dr. Harald von der Osten 
  To: 'Manifold List Server' 
  Sent: Saturday, October 07, 2006 12:47 PM
  Subject: [Manifold-l] 3D with Manifold


  Hi,

  just thinking about buying Manifold or not: What's about the quality of the
  representation overlaying bitmaps on 3D surfaces? In a message some years ago I
  found that someone was not very happy with the quality of drapping bitmaps on
  3D-surfaces. Is this now improved in Manifold 7? Comparable to 3DEM? And is it
  possible to drap more than one bitmap on DEM data?

  Thanks a lot for any short answer which will help me in my decision...

  Harald


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