[GRASSLIST:285] Re: r.out.gdal problem

[Jachym Cepicky]

Hallo,

On Tue, Mar 21, 2006 at 04:59:43PM +0100, Wolfgang Zillig wrote:
> To make it clear, I have a georeferenced raster grafic. r.out.tiff works, and I 
> can do successfully:
> 
> C:\Documents and Settings\s0167070>gdal_translate -of GTiff -co TILED=YES -co 
> CO
> MPRESS=JPEG -co JPEG_QUALITY=65 in.tif out.tif
> 
> (But I have to say that I also have FWTools installed on my computer, I haven't 
> tried with cygwin)
> 
> Is it possible to export a raster file with the command given above? Grass 
> always complains that I have to specify the "type", which I don't know.

Type is, what does your r.info your_map |grep "Data Type" you.

This will be CELL (integer), DCELL or FCELL (floating point)

r.out.tiff makes always integers from floating point maps. via
r.out.gdal's "type" option, you can specify the precision of resulting
raster file

hope, this helps

Jachym

> 
> Wolfgang
> 
> 
> Patton, Eric schrieb:
> >When you say graphic, do you mean a non-georeferenced image? I'm guessing,
> >maybe r.out.gdal is only good for georeferenced images. Have you had any
> >luck trying 'gdal_translate -of JPEG input output'?
> >
> >~ Eric.
> > -----Original Message-----
> >From: owner-GRASSLIST at baylor.edu
> >To: grasslist-en
> >Sent: 3/21/2006 10:18 AM
> >Subject: [GRASSLIST:281] r.out.gdal problem
> >
> >Hello,
> >
> >I somehow don't completely understand the usage of r.out.gdal. I prepared a 
> >graphic (which is an imported tiff) with r.composite. I can export it with 
> >r.out.tiff without any problems. But how can I use r.out.gdal to export it as 
> >JPEG (or GTiff with TILED=YES). I always fail
> >
> >to specify the correct option for the required "type". I already tried every 
> >possibility which is listed (Byte, Int16,...), but without success. What 
> >"type" do I have to use?
> >
> >Thanks
> >
> >Wolfgang
> >
> >
> >  
> 

-- 
Jachym Cepicky                                  
e-mail: jachym.cepicky at centrum.cz           
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