[FWTools] Merging Large Image Sets
shaun.kolomeitz at epa.qld.gov.au
Mon Mar 27 22:16:40 EST 2006
I'll give that a bash.
> -----Original Message-----
> From: Frank Warmerdam [mailto:fwarmerdam at gmail.com]On Behalf Of Frank
> Sent: Tuesday, 28 March 2006 12:37 PM
> To: Shaun Kolomeitz
> Cc: fwtools at lists.maptools.org
> Subject: Re: [FWTools] Merging Large Image Sets
> Shaun Kolomeitz wrote:
> > 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 ?
> GeoTIFF format only supports up to 4GB images, though the
> GeoTIFF writer
> doesn't currently recognise that it is producing a corrupt
> file. I would
> suggest you do the merge to Erdas Imagine format as it
> supports very large
> files reasonably efficiently.
> The Imagine file could be used directly in ArcGIS and ArcMap.
> To produce Imagine files with gdal_merge use the "-of HFA" switch.
> PS. there is already a bug report outstanding on GDAL (and
> libtiff) not
> recognising that they are producing too-large (corrupt) files.
> Best regards,
> I set the clouds in motion - turn up | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush | President OSGF,
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