[gdal-dev] GTiff optimisation

Matt Wilkie matt.wilkie at gov.yk.ca
Tue Aug 30 12:46:53 EDT 2011

Yves,  it's best to use gdalwarp without any compression options and 
then use gdal_translate as a last step to apply the compression. See 
for more.


matt wilkie
Geomatics Analyst
Information Management and Technology
Yukon Department of Environment
10 Burns Road * Whitehorse, Yukon * Y1A 4Y9
867-667-8133 Tel * 867-393-7003 Fax

On 30/08/2011 4:22 AM, Yves Jacolin wrote:
> Hello,
> I am converting GTiff to GTiff in order to add projection and georeferencing
> information in the header. I am using gdalwarp with some flags, mailny -co
> flags. I have some question about this.
> Here is my command line:
> s_srs "EPSG:2154" -t_srs "EPSG:2154" input.tif output.tif
> 1.  File size: input.tif and output.tif have different file size, output file is
> 50 % bigger than the input file. Is it normal?
> 2. If I use gdalinfo on my output file, I have no information about MINISWHITE
> parameter while I have it in the input file. Am I using this creation option
> correctly? This issue could be related to the first item?
> 3. I also have a "AREA_OR_POINT=Area" item in my output from gdalinfo, what
> does it means?
> gdal version: GDAL 1.7.3, released 2010/11/10
> thanks,
> Y.

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