Thanks for everyones help and quick responses. I can create the 8
geotiff files (approx 1.8Gb each).

Just some more questions.

1) To create the elevation file using topography (2km) png file is the
following command correct  
gdal_translate srtm_ramp2.world.21600x10800.png topo.tif 
gdaladdo -r average topo.tif 2 4 8 16 32 64 128 256

2) To build the OSG earth output file (ive) using the 8 geotiff and
elevation data file is the following command correct?
osgdem --bluemarble-west -t A1.tif -t A2.tif -t B1.tif -t B2.tif
--bluemarble-east -t C1.tif -t C2.tif -t D1.tif -t D2.tif --whole-globe
-d topo.tif --geocentric -l 12 -o earth.ive

3) If the above command is incorrect, do I use gdal_merge script to
create a west and east tif by creating a mosiac image. For example use
A1.tif, A2.tif, B1.tif, and B2.tif to create west.tif.

4) What should I expect the total storage size of all the tiles to be? 5
Gb?

Thanks again.

Looch


-----Original Message-----
From: Norman Vine [mailto:[EMAIL PROTECTED] 
Sent: Saturday, 16 December 2006 4:02 AM
To: 'osg users'
Subject: RE: [osg-users] Building Blue marble images

Clay, Bruce writes:
> 
> Rather than redo what has already been done and the quantity of files 
> in BMNG, does anyone have world files for Blue Marble Next Generation 
> that they are willing to share?

Better then that here are the geotiffs
http://telascience.sdsc.edu/tela_data/BM/geotiff/

Here is the basic script I used todo this
http://telascience.sdsc.edu/tela_data/BM/world_big/geotif/bmng_scripts/m
ake_
world.topo.3x86400x43200.py
Will need to be tweaked for your local setup etc

Enjoy

Norman

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