[GRASS-user] Working with large images

[Ned Horning]

Hi -

I am trying to load a large (8 GB) tiff image into GRASS 6.4 RC4 and I 
get an error message saying that BigTIFF is not support by this version 
of GDAL and libtiff. Is there a way to read BigTIFF files using GRASS? 
What about exporting GigTIFF files? I could read in individual IKONOS 
images and then create a mosaic but I would then need to be able to 
export the mosaic at a BigTIFF.

I installed GRASS 6.4 using the weekly snapshot from today. I'm using 
Ubuntu and had to set up a symbolic link for libgdal.so.1 and I used 
libgdal1.5.0.so.1 for that (i.e., -s /usr/lib/libgdal.1.5.0.so.1 
/usr/lib/libgdal.so.1)

I am trying to create GeoTIFF mosaics to input into R. I tried using 
spgrass6 but once I started using large files it didn't work since I 
wasn't able to read images one line at a time so I have been using 
GeoTIFF files. At the moment I'm using OSSIM to create the mosaics (~ 8 
hours for 4 IKONOS images) but I need a GIS package to digitize training 
areas for the random forest algorithm. I was hoping I could do this in 
GRASS since QGIS and ArcInfo don't handle BigTIFF. I'd like to be able 
to run everything from GRASS but without the ability to read GRASS 
images one line at a time in R I'm using an alternative approach.

Any thoughts would be appreciated.

Ned