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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kevin,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I find reasonably acceptable performance
with –wm 500 –config GDAL_CACHEMAX 512 and reading from one disk
located on one controller and writing to another (preferably local and fast
disk).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I also find working in the 64bit version
of GDAL faster in my config (Win 7 x64, SSD + SAS disk array).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Cheers,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Shaun<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
GeoSpatial - Kevin [mailto:gs.kevin1@gmail.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, 25 June 2010 5:30 PM<br>
<b><span style='font-weight:bold'>To:</span></b> gdal-dev@lists.osgeo.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [gdal-dev] gdalwarp large
imagery</span></font><span lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi all,<br>
<br>
I am trying to re-project a very large image (size 40,000 by 40,000 pixels,
resolution ~120m) located at high latitudes (60N) to a standard wgs84. By
searching some previous posts, I come up with the following command: <br>
<br>
gdalwarp -of EHdr -t_srs EPSG:4326 -tr 0.001111 0.001111 --config
GDAL_CACHEMAX 200 -wm 200 -wo SKIP_NOSOURCE=YES -r bilinear -multi
input_ice.tif output_ice.tif<br>
<br>
it is working now but the speed is very slow - likely this will take 12
hours... Any way to speed up or am I wrong in selecting the parameters? Many
thanks.<br>
<font color="#888888"><span style='color:#888888'><br>
Kevin</span></font> <o:p></o:p></span></font></p>
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<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;"> </span></p>
<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">+----------------------------------------------------------------+</span></p>
<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">Think B4U Print</span></p>
<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">1 ream of paper = 6% of a tree and 5.4kg CO2 in the atmosphere</span></p>
<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">3 sheets of A4 paper = 1 litre of water</span></p>
<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">+----------------------------------------------------------------+</span></p>
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