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]<mailto:[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]<mailto:[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]<mailto:[email protected]> http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584<tel:%2B91-9494447584> 17.2416N 80.1426E _______________________________________________ gdal-dev mailing list [email protected]<mailto:[email protected]> http://lists.osgeo.org/mailman/listinfo/gdal-dev
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