[gdal-dev] gdalwarp large imagery

[Shaun Kolomeitz]

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:gs.kevin1 at gmail.com] 
Sent: Friday, 25 June 2010 5:30 PM
To: gdal-dev at lists.osgeo.org
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 



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