Hi, I tried r.to.rast3elev, however, that creates 3D volumes, rather than surfaces, doesn't it? And nviz has problems displaying those, I've never managed it.
Yes, I would like to "drape" a flat 2D raster image over 3D raster surfaces or vector data. However, I would like to retain that elevation information, basically create a 3D (or 2.5D) raster image from a flat one. Here's the case study: I have a flat satellite image for my site. I also have topological survey data, in the shape of a points vector layer, with z-values in the attribute table. I have a 3D layer of the same, created by using v.to.3d I furthermore have an interpolated raster surface from the points survey data, which is 2.5D. I would now like to drape the 2D satellite image over either the vector points or their interpolated surface and thus create a 2.5 / 3D version of the same satellite image, which I can then visualize in 3D, standalone. Many thanks! Anna ----- Original Message ----- From: "Markus Metz" <[email protected]> To: "Anna Hodgkinson" <[email protected]> Cc: "grass-user grass-user" <[email protected]> Sent: Thursday, 3 November, 2011 2:45:18 PM Subject: Re: [GRASS-user] Draping of Raster images On Thu, Nov 3, 2011 at 3:32 PM, Anna Hodgkinson <[email protected]> wrote: > Thank you, but neither of those would work for me - what I'm trying to > do is to make a 2D raster image 3D. > And I don't mean visualisation, I mean assigning cell values for > elevation from either another 3D surface or vector layer (both of > which I have). Do you mean something like r.to.rast3elev? http://grass.osgeo.org/grass64/manuals/html64_user/r.to.rast3elev.html The link you gave only shows how to drape a 2D raster over elevation, it does not show how to assign z-coordinates and create a 3D raster. Maybe the confusion goes away if you could explain what you want to do with the 3D raster. Markus M > > Sorry! > > Anna > > > ----- Original Message ----- > From: "Saber Razmjooei" <[email protected]> > To: "Anna Hodgkinson" <[email protected]> > Cc: "Saber Razmjooei" <[email protected]>, "grass-user > grass-user" <[email protected]> > Sent: Thursday, 3 November, 2011 2:21:23 PM > Subject: Re: [GRASS-user] Draping of Raster images > > Alternatively, you can use: > > r.shaded.relied > > That will be 2D only. > > > > >> Thanks, but there doesn't seem to be a way of elevating a 2D raster >> surface. Do you have any experience with this, and would know what >> command to use? >> >> Many thanks, >> >> Anna >> >> >> ----- Original Message ----- >> From: "Saber Razmjooei" <[email protected]> >> To: "Anna Hodgkinson" <[email protected]> >> Cc: [email protected] >> Sent: Thursday, 3 November, 2011 1:52:36 PM >> Subject: Re: [GRASS-user] Draping of Raster images >> >> This page might be helpful: >> >> http://grass.osgeo.org/wiki/Help_with_3D >> >> >> Cheers >> Saber >> >>> Dear all, >>> >>> I was wondering whether it is possible to use GRASS to drape raster >>> images over existing 3D surfaces or vector layers. >>> >>> I know ArcGIS is capable of this, is seems a fairly straight-forward >>> procedure there >>> (http://webhelp.esri.com/arcgisdesktop/9.3/tutorials/3D_analyst/3D_5.htm), >>> so I was hoping to achieve the same using open source GIS. >>> >>> GRASS has a v.drape module, which can drape vector layers over 3D >>> surfaces, NVIZ seems to do the same. >>> >>> It would be great if someone could tell me that GRASS (or any other >>> open source GIS package) is capable of draping raster images over >>> either other >>> rasters or vectors containing elevation information. >>> >>> Many thanks and all the best, >>> >>> Anna >>> >>> ______________________________________________ Anna Kathrin >>> Hodgkinson MA MSt (Oxon) AIFA EES >>> Supervisor Geomatics >>> >>> Oxford Archaeology: Exploring the Human Journey >>> Mobile: +44 (0)7906 638308 (personal) >>> Direct Dial: +44 (0)1865 980 855 >>> http://thehumanjourney.net >>> >>> Files attached to this email may be in ISO 26300 format (OASIS Open >>> Document Format). If you have difficulty opening them, please visit >>> http://iso26300.info for more information. >>> >>> This email has been processed by SmoothZap - www.smoothwall.net >>> >>> _______________________________________________ grass-user mailing >>> list [email protected] >>> http://lists.osgeo.org/mailman/listinfo/grass-user >>> >> Files attached to this email may be in ISO 26300 format (OASIS Open >> Document Format). If you have difficulty opening them, please visit >> http://iso26300.info for more information. >> >> This email has been processed by SmoothZap - www.smoothwall.net >> >> > Files attached to this email may be in ISO 26300 format (OASIS Open > Document Format). 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