[GRASS-user] Accentuating/adding topography to a raster image?

[Jonathan Greenberg]

We are printing this out for a 9 foot by 5 foot wall installation, so we
need to keep the resolution (as it stands it will output about a 130 dpi,
the range for the printer is 100 to 200 dpi).

--j

--

Jonathan A. Greenberg, PhD
NASA Postdoctoral Researcher
NASA Ames Research Center
MS 242-4
Moffett Field, CA 94035-1000
Phone: 415-794-5043
AIM: jgrn3007
MSN: jgrn3007 at hotmail.com

-----Original Message-----
From: Jachym Cepicky [mailto:jachym.cepicky at centrum.cz] 
Sent: Saturday, August 12, 2006 11:13 AM
To: Jonathan Greenberg
Cc: 'GRASS user list'
Subject: Re: [GRASS-user] Accentuating/adding topography to a raster image?

what about resample your resolution? 

    g.region res=*MORE*

result could be still printable, but it would not be so big

jachym

On Sat, Aug 12, 2006 at 11:00:28AM -0700, Jonathan Greenberg wrote:
> My main problem is the dem and image are both about 1.5 gb each -- am I
> likely to run into problems with this?  
> 
> Never played with nviz before, looks like I'll be trying it out tonight!
> 
> --j
> 
> --
> 
> Jonathan A. Greenberg, PhD
> NASA Postdoctoral Researcher
> NASA Ames Research Center
> MS 242-4
> Moffett Field, CA 94035-1000
> Phone: 415-794-5043
> AIM: jgrn3007
> MSN: jgrn3007 at hotmail.com
> 
> -----Original Message-----
> From: Michael Barton [mailto:michael.barton at asu.edu] 
> Sent: Saturday, August 12, 2006 10:54 AM
> To: Jachym Cepicky; Jonathan Greenberg
> Cc: 'GRASS user list'
> Subject: Re: [GRASS-user] Accentuating/adding topography to a raster
image?
> 
> This is also automatically done in the GUI. Just put your shaded relief
map
> into the basemap field and your image into the drape map field.
> 
> Display and presto, you have a topographically shaded image.
> 
> You can also do this in nviz for an even more dramatic effect. Use a DEM
> (not shaded relief) as a basemap/elevation map and use your image as a
color
> map for the topography.
> 
> Michael
> __________________________________________
> Michael Barton, Professor of Anthropology
> School of Human Evolution & Social Change
> Center for Social Dynamics & Complexity
> Arizona State University
> 
> phone: 480-965-6213
> fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton
> 
> 
> 
> > From: Jachym Cepicky <jachym.cepicky at centrum.cz>
> > Date: Sat, 12 Aug 2006 12:27:33 +0200
> > To: Jonathan Greenberg <jgreenberg at arc.nasa.gov>
> > Cc: 'GRASS user list' <grassuser at grass.itc.it>
> > Subject: Re: [GRASS-user] Accentuating/adding topography to a raster
> image?
> > 
> > Hi,
> > 
> > I use this approach:
> > 
> > d.his h=your_map i=aspect
> > 
> > or
> > 
> > d.his h=your_map i=r_shaded_relief
> > 
> > or run nviz and set the light source ;-)
> > 
> > jachym
> > 
> > 
> > On Sat, Aug 12, 2006 at 02:45:22AM -0700, Jonathan Greenberg wrote:
> >> We're trying to add in a bit of topographic shading/illumination into
an
> >> image, and I was hoping to get some feedback on what algorithms work
the
> >> best?  I tried a hillshade approach in ENVI, was pretty unimpressed
with
> it.
> >> Any suggestions for a GRASS approach?  Run r.sun and do some sort of
> pixel
> >> weighting?
> >> 
> >> --j
> >> 
> >> --
> >> 
> >> Jonathan A. Greenberg, PhD
> >> NASA Postdoctoral Researcher
> >> NASA Ames Research Center
> >> MS 242-4
> >> Moffett Field, CA 94035-1000
> >> Phone: 415-794-5043
> >> AIM: jgrn3007
> >> MSN: jgrn3007 at hotmail.com
> >> 
> >> 
> >> 
> >> _______________________________________________
> >> grassuser mailing list
> >> grassuser at grass.itc.it
> >> http://grass.itc.it/mailman/listinfo/grassuser
> > 
> > -- 
> > Jachym Cepicky
> > e-mail: jachym.cepicky at centrum.cz
> > URL: http://les-ejk.cz
> > GPG:
http://les-ejk.cz/gnupg_public_key/jachym_cepicky-gpg_public_key.asc
> > -----------------------------------------
> > OFFICE:          
> > GDF-Hannover
> > Mengendamm 16d
> > 30177 Hannover
> > Germany
> > e-mail: cepicky at gdf-hannover.de
> > URL:    http://gdf-hannover.de
> > Tel.:   +49 511-39088507
> 
> 
> _______________________________________________
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-- 
Jachym Cepicky
e-mail: jachym.cepicky at centrum.cz
URL: http://les-ejk.cz
GPG: http://les-ejk.cz/gnupg_public_key/jachym_cepicky-gpg_public_key.asc
-----------------------------------------   
OFFICE:                                     
GDF-Hannover
Mengendamm 16d
30177 Hannover
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Tel.:   +49 511-39088507