Adiba, Do you really need to warp the rasters? Aren't the source and destination in the same SRS?
On Tue, Jul 15, 2014 at 9:25 AM, adiba nizami <adiba.niz...@gmail.com> wrote: > I am using gdal1.5 , considering version change not an option....can you > please tell how I can make use of gdal warp ?... > > > > On Mon, Jul 14, 2014 at 1:22 PM, Chaitanya kumar CH < > chaitanya...@gmail.com> wrote: > >> Adiba, >> >> I noticed that your source and target projections are same. Why not use >> gdalbuildvrt and gdal_translate and skip the warping process? You create a >> virtual mosaic (and assign the projection if needed) with buildvrt. You can >> create a tiff file from the vrt file using gdal_translate. >> >> >> On Mon, Jul 14, 2014 at 11:12 AM, adiba nizami <adiba.niz...@gmail.com> >> wrote: >> >>> 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. < >>> thornto...@ornl.gov> 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:* gdal-dev-boun...@lists.osgeo.org [mailto: >>>> gdal-dev-boun...@lists.osgeo.org] *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 < >>>> chaitanya...@gmail.com> wrote: >>>> >>>> garfy, >>>> >>>> >>>> >>>> Please provide the gdalwarp command you used. Did you modify >>>> GDAL_CACHEMAX? >>>> >>>> >>>> >>>> On Thu, Jul 10, 2014 at 3:26 PM, garfy <adiba.niz...@gmail.com> 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 >>>> gdal-dev@lists.osgeo.org >>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> Best regards, >>>> Chaitanya kumar CH. >>>> >>>> +91-9494447584 >>>> 17.2416N 80.1426E >>>> >>>> >>>> _______________________________________________ >>>> gdal-dev mailing list >>>> gdal-dev@lists.osgeo.org >>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>> >>>> >>>> >>>> _______________________________________________ >>>> gdal-dev mailing list >>>> gdal-dev@lists.osgeo.org >>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>> >>> >>> >>> >>> -- >>> Regards, >>> Adiba Khan >>> >> >> >> >> -- >> Best regards, >> Chaitanya kumar CH. >> >> +91-9494447584 >> 17.2416N 80.1426E >> > > > > -- > Regards, > Adiba Khan > -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E
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