[udig-devel] Success: How to open a large tiff

[Adrian Custer <acuster@xxxxxxxxx>]

Thanks all,

creating a .wld file and -Xmx1024M did the trick.

--adrian

On Wed, 2007-03-28 at 11:30 +0200, Andrea Aime wrote:
> Adrian Custer ha scritto:
> > Hey all,
> > 
> > I'm trying to digest a 1/2 global land cover tiff. The source is:
> > http://earthobservatory.nasa.gov/Newsroom/LCC/
> > and the specific file is
> > http://earthobservatory.nasa.gov/Newsroom/LCC/Images/lcc_east_1km.tif
> > 
> > nothing on my machine can open this file. Is there a way to add the
> > location information to the file so uDig can open it? Also, is there a
> > way to pre-tile the file into one of those image pyramids I keep hearing
> > about? 
> 
> With current uDig, you'll have hard times, 25MB is a bit big for it,
> give it plenty of memory. And you have to write a .tfw file for it,
> see some docs here:
> http://www.omg.unb.ca/~jonnyb/processing/geotiff_tifw_format.html
> http://www.gdal.org/frmt_various.html#WLD
> 
> In the future, with a uDig that uses geotools 2.3.x or trunk, it's going
> to be relatively quick, especially if you do use gdal_translate to pre 
> tile it, and gdaladdo to add overviews to it.
> Pyramids, forget about them, the pyramid generator is broken at the 
> moment, but besides this, you don't need a pyramid for such a "small" 
> file (it's only 25MB).
> 
> Cheers
> Andrea