Sorry for the late reply. Here is the command i gave : gdalwarp --config GDAL_CACHEMAX 512 -s_srs "+proj=aea +lat_1=28 +lat_2=12 +lat_0=20 +lon_0=87 +x_0=2000000 +y_0=2000000 +ellps=WGS84 +datum=WGS84 +units=m +no_defs" -t_srs "+proj=aea +lat_1=28 +lat_2=12 +lat_0=20 +lon_0=87 +x_0=2000000 +y_0=2000000 +ellps=WGS84 +datum=WGS84 +units=m +no_defs" -te -138559.10 571316.50 3010515.63 4012751.95 -tr 18 18 -wm 512 -co "BIGTIFF=YES" -srcnodata 255 -dstnodata 255 file1.tif file2.tif ..... file28.tif output.tif
On Thu, Jul 10, 2014 at 7:23 PM, Thornton, Michele M. <[email protected]> wrote: > Hello, > > > > I’m interested in this thread. One comment I can add about gdal_merge.py > is that it does not properly handle nodata values from the full (padded) > extent of the input files. gdalwarp, which can be VERY slow, does handle > the nodata values correctly. > > > > Michele Thornton > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *bas smit > *Sent:* Thursday, July 10, 2014 7:52 AM > *To:* Chaitanya kumar CH > *Cc:* gdal dev > *Subject:* Re: [gdal-dev] warp taking time > > > > I am wondering why you are using gdalwarp for mosaicing images having same > projection instead of gdal_merge.py? > > > > Bas Smit > > > > On Thu, Jul 10, 2014 at 7:14 PM, Chaitanya kumar CH < > [email protected]> wrote: > > garfy, > > > > Please provide the gdalwarp command you used. Did you modify GDAL_CACHEMAX? > > > > On Thu, Jul 10, 2014 at 3:26 PM, garfy <[email protected]> wrote: > > Dear All, > > I am trying to generate mosaic of 28 input images using *gdalwarp*. > All are in same projection. It has taken 5 days to generate the final > output. > Please find the gdalinfo of input and output attached. The input files are > passed to warp in the order in which the gdalinfo is present in the > attachement. > > Any input on improving the time would be really helpful. > > > Thanks > input_files_gdalinfo.txt > < > http://osgeo-org.1560.x6.nabble.com/file/n5150453/input_files_gdalinfo.txt > > > final_output_gdalinfo.txt > < > http://osgeo-org.1560.x6.nabble.com/file/n5150453/final_output_gdalinfo.txt > > > > > > > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/warp-taking-time-tp5150453.html > Sent from the GDAL - Dev mailing list archive at Nabble.com. > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > > > -- > Best regards, > Chaitanya kumar CH. > > +91-9494447584 > 17.2416N 80.1426E > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Regards, Adiba Khan
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