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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Michele Thornton<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gdal-dev-bounces@lists.osgeo.org [mailto:gdal-dev-bounces@lists.osgeo.org]
<b>On Behalf Of </b>bas smit<br>
<b>Sent:</b> Thursday, July 10, 2014 7:52 AM<br>
<b>To:</b> Chaitanya kumar CH<br>
<b>Cc:</b> gdal dev<br>
<b>Subject:</b> Re: [gdal-dev] warp taking time<o:p></o:p></span></p>
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<p class="MsoNormal">I am wondering why you are using <span style="font-family:"Arial","sans-serif"">gdalwarp for mosaicing images having </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#500050">same projection instead of gdal_merge.py?</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#500050">Bas Smit</span><o:p></o:p></p>
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<p class="MsoNormal">On Thu, Jul 10, 2014 at 7:14 PM, Chaitanya kumar CH <<a href="mailto:chaitanya.ch@gmail.com" target="_blank">chaitanya.ch@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">garfy,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Please provide the gdalwarp command you used. Did you modify GDAL_CACHEMAX?<o:p></o:p></p>
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<p class="MsoNormal">On Thu, Jul 10, 2014 at 3:26 PM, garfy <<a href="mailto:adiba.nizami@gmail.com" target="_blank">adiba.nizami@gmail.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">Dear All,<br>
<br>
I am trying to generate mosaic of 28 input images using *gdalwarp*.<br>
All are in same projection. It has taken 5 days to generate the final<br>
output.<br>
Please find the gdalinfo of input and output attached. The input files are<br>
passed to warp in the order in which the gdalinfo is present in the<br>
attachement.<br>
<br>
Any input on improving the time would be really helpful.<br>
<br>
<br>
Thanks<br>
input_files_gdalinfo.txt<br>
<<a href="http://osgeo-org.1560.x6.nabble.com/file/n5150453/input_files_gdalinfo.txt" target="_blank">http://osgeo-org.1560.x6.nabble.com/file/n5150453/input_files_gdalinfo.txt</a>><br>
final_output_gdalinfo.txt<br>
<<a href="http://osgeo-org.1560.x6.nabble.com/file/n5150453/final_output_gdalinfo.txt" target="_blank">http://osgeo-org.1560.x6.nabble.com/file/n5150453/final_output_gdalinfo.txt</a>><br>
<br>
<br>
<br>
<br>
<br>
--<br>
View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/warp-taking-time-tp5150453.html" target="_blank">
http://osgeo-org.1560.x6.nabble.com/warp-taking-time-tp5150453.html</a><br>
Sent from the GDAL - Dev mailing list archive at Nabble.com.<br>
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<p class="MsoNormal"><span class="hoenzb"><span style="color:#888888">-- </span></span><span style="color:#888888"><br>
<span class="hoenzb">Best regards,</span><br>
<span class="hoenzb">Chaitanya kumar CH.</span><br>
<br>
<span class="hoenzb"><a href="tel:%2B91-9494447584" target="_blank">+91-9494447584</a></span><br>
<span class="hoenzb">17.2416N 80.1426E </span></span><o:p></o:p></p>
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