[gdal-dev] Re: Problem with gdal_translate

[Hermann Peifer]

gdal_translate -scale src_dataset.asc dst_dataset.tif


-scale [src_min src_max [dst_min dst_max]]:
     Rescale the input pixels values from the range src_min to src_max 
to the range dst_min to dst_max. If omitted the output range is 0 to 
255. If omitted the input range is automatically computed from the 
source data.

see: http://gdal.org/gdal_translate.html

By the way: TILES is not a valid creation option (TILED however is).

Hermann


Chris Emberson wrote:
> Thanks for your reply.
> 
> Would you be able to give me an example of the syntax for the 
> gdal_translate option*?
> *How do I change the dynamics to 8 bits?*
> -scale* /[src_min src_max [dst_min dst_max]]/:
> 
> Thanks
> 
> Chris
> 
>  > Date: Fri, 11 Sep 2009 18:06:48 +0200
>  > From: even.rouault at mines-paris.org
>  > To: chrisemberson at hotmail.com
>  > CC: gdal-dev at lists.osgeo.org
>  > Subject: Re: [gdal-dev] Problem with gdal_translate
>  >
>  > Selon Chris Emberson <chrisemberson at hotmail.com>:
>  >
>  > The behaviour you see is expected. -expand rgb only works for bands 
> that have
>  > color maps. You can transform your grey scale FILEA.asc into a RGB 
> file by doing
>  > this :
>  >
>  > gdal_translate -of GTiff -co "TILES=YES" -b 1 -b 1 -b 1 FILEA.asc 
> FILEB.tif
>  >
>  > This will use the source band 1 for the R, G, B components of the 
> output file.
>  > You may need to use the scaling/translate options of gdal_translate 
> to reduce
>  > the dynamics to 8 bits.
>  >
>  > >
>  > > I am having trouble converting a single band raster (.asc) when 
> using the
>  > > GDAL utility gdal_translate (version 1.6)
>  > >
>  > > This is the command...
>  > > gdal_translate -of GTiff -co "TILES=YES" -expand rgb FILEA.asc 
> FILEB.tif
>  > >
>  > > I get this message....
>  > >
>  > >
>  > >
>  > >
>  > > Error : band 1 has no color table
>  > >
>  > > I want to be able to tile this raster using Mapnik - therefore it 
> needs to be
>  > > a 3 band tiff - Can anyone help with this problem?
>  > >
>  > > Thanks in advance
>  > >
>  > > Chris
>  > >
>  > >
>  > >
>  > >
>  > >
>  > >
>  > >
>  > > _________________________________________________________________
>  > > Save time by using Hotmail to access your other email accounts.
>  > > http://clk.atdmt.com/UKM/go/167688463/direct/01/
>  >
>  >
> 
> ------------------------------------------------------------------------
> View your other email accounts from your Hotmail inbox. Add them now. 
> <http://clk.atdmt.com/UKM/go/167688463/direct/01/>
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev