I am trying to clip a large ECW (details below) but the raster file is too big to be processed entirely.
Some details of the ECW below
Driver: ECW/ERDAS Compressed Wavelets (SDK 5.0)
file size: 50gb Size is 450000, 565081 Pixel size: 0.15 0.15 COLORSPACE=RGB COMPRESSION_RATE_TARGET=9 VERSION=2 Number of bands: 4
The area I want to clip is roughly a 1/5 of the original file.
Here are the methods I have tried out with no success:
Used Arcgis to save the ecw to tiff / other formats... (I quickly gave up)
Used Qgis and its clipper tool... the file creation stayed stuck at about 40%.
Used gdal_translate out of OSGeo4W with other options than Qgis. (Tried that thinking that MAYBE freeing some memory not using Qgis would the trick)
Used gdal_retile thinking that I would cut the image into pieces and grab the one I wanted. The command "gdal_retile -ps 10000 10000 -of ecw -tileIndex tile.shp -targetDir input.ecw This crashed even quicker"
Does anyone have an idea?
For info I run windows 7 64bits on an i5-3470 3.2Ghz with 16gb of ram.