[GRASS-user] Why Does Re-projection Increase Disk Space Used?

[Daniel Victoria]

Some things come to mind:
1) The resolution has changed
2) the number of bits per pixel has changed
3) the region of the reprojected file is bigger than the original file
so you have lots of nulls.

Daniel

On Wed, Mar 14, 2012 at 12:28 PM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
>  I have a source 28M DEM in a directory with geographic coordinates in
> Lat/Long. When I re-project that to another location and dataset with
> Lambert Conformal Conic projection the disk space consumed bloats to 106G.
> That's more than a 20x increase. Why?
>
>  In the destination location/directory there's no .tmp/ subdirectory with a
> huge file.
>
> Rich
>
>
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