[FWTools] Merging Large Image Sets

[Shaun Kolomeitz]

Dear FWTools list,

I am attempting to merge a set of satellite images (about 60Gb) into one large (or a few smaller) single images using gdal_merge. The images have been converted from GeoTIFF to JPEG2k and all individually appear in the correct position (as JP2k's). I then merge all the JP2k images into a single GeoTIFF image (which I can't view on anything because they are > 2 Gb (Yes I am using WINDOZE 2k O.S). Unfortunately when I do a gdal_translate to compress the image (from GeoTIFF to JP2) to be less than the 2Gb file size, the merged image appears to be a random mosaic of the images listed.
Is there a specific order I should put these in the list supplied to the gdal_merge command ? When I tried to use FWTools OpenEV to Import the large GeoTIFF it died a nasty death with no warnings.
The eventual image/s will be used in ESRI's ArcGIS/ArcMap products.

Any suggestions from the list on formats &/or methods ?


TIA,
Shaun Kolomeitz
Senior Technical Officer
Systems & Support Branch
Parks Division
Environmental Protection Agency



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