Kevin,
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). I also find working in the 64bit version of GDAL faster in my config (Win 7 x64, SSD + SAS disk array). Cheers, Shaun ________________________________ From: GeoSpatial - Kevin [mailto:[email protected]] Sent: Friday, 25 June 2010 5:30 PM To: [email protected] Subject: [gdal-dev] gdalwarp large imagery Hi all, 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: 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 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. Kevin +----------------------------------------------------------------+ Think B4U Print 1 ream of paper = 6% of a tree and 5.4kg CO2 in the atmosphere 3 sheets of A4 paper = 1 litre of water +----------------------------------------------------------------+
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