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
http://trac.osgeo.org/gdal/wiki/UserDocs/GdalWarp#GeoTIFFoutput-coCOMPRESSisbroken
for more.
cheers,
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
http://environmentyukon.gov.yk.ca/geomatics/
--------------------------------------------
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:
gdalwarp -co "COMPRESS=PACKBITS" -co "PHOTOMETRIC=MINISWHITE" -co "NBITS=1" -
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.
_______________________________________________
gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
