[FWTools] Merging Large Image Sets

[Shaun Kolomeitz]

Thanks Frank,

I'll give that a bash.

Cheers,
Shaun
> -----Original Message-----
> From: Frank Warmerdam [mailto:fwarmerdam at gmail.com]On Behalf Of Frank
> Warmerdam
> 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 ?
> 
> Shaun,
> 
> 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, 
http://osgeo.org




___________________________
Disclaimer

This e-mail, including attachments if any, has originated from a Queensland government agency and may contain information that is confidential, or covered by legal professional privilege, and is intended for the named recipient(s) only.  If you have received this message in error, you are asked to inform the sender as quickly as possible and delete this message and any copies of this message from your computer system network.

Any form of disclosure, modification, distribution and/or publication of this e-mail, including attachments is prohibited.  Unless otherwise stated, this e-mail, including attachments represents the views of the sender and not the views of the Environmental Protection Agency.

Although this e-mail has been checked for the presence of computer viruses, the Environmental Protection Agency provides no warranty that all possible viruses have been detected and cleaned.  Any use of this e-mail could harm your computer system.
___________________________