hallo,
Can be, but the values should
be there and you should be able to set some color pallet as you wish
(e.g. qgis: layer properties)
see http://les-ejk.cz/tmp/a1.png
jachym
On Tue, Mar 21, 2006 at 08:24:35PM +0100, Wolfgang Zillig wrote:
Int32 gives very unrealistic colors see
http://www.student.kuleuven.ac.be/~s0167070/grass/a1.tif
Int16 gives grayscale
GRASS 6.1.cvs (uberg_mgi):/cygdrive/d/temp > r.out.gdal format=GTiff
metaopt=TILED=YES,COMPRESS=JPEG,JPEG_QUALITY=75 input=a1 output=a1.tif
type=Int32
Writing format: GTiff
Writing type: Int32
Input file size is 535, 422
0.Warning 1: Unable to export color table to GeoTIFF file. Color
tables can only be written to 1 bit 8bit GeoTIFF files.
..10...20...30...40...50...60...70...80...90...100 - done.
GRASS 6.1.cvs (uberg_mgi):/cygdrive/d/temp >
Wolfgang
Jachym Cepicky schrieb:
>I would say, that type=Int32 shold work fine
>
>jachym
>
>On Tue, Mar 21, 2006 at 06:53:50PM +0100, Wolfgang Zillig wrote:
>
>>My raster map is from the type CELL (with a range of [0-32767]). Can I use
>>(and how) r.out.gdal directly?
>>
>>Wolfgang
>>
>>
>>
>>Jachym Cepicky schrieb:
>>
>>>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@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@centrum.cz
URL: http://les-ejk.cz
GPG: http://les-ejk.cz/gnupg_public_key/
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