On 20/09/2010 18:09, Adam Dershowitz, Ph.D., P.E. wrote:
I have a large ortho image, that is in MrSID format (A full county at high
res). The file is ~3.5 gig. It covers a much larger area then I need. So I
set my region to the size that I do need, and then imported. The import took
something like 10 hrs. And, I now see that in my PERMANENT folder I have 3
files that are each 15 gig (one red, one blue, one green),
The map was imported, but if I zoom to the size of the current map, it seems
that the whole map was imported, not just the area inside the current region.
I thought that imports are cropped to the current region? Am I mistaken about
this? Is there some setting to cause this to happen?
I did the import with r.in.gdal. I am using the binary release of 6.4 on a Mac.
The reasons that I care are 1) This map, for a small area of interest, it
taking up 45 gig on my hard drive. 2) Because the map is so large, it takes a
while for the display to update when I make any changes.
Any guidance?
> Raster import and export
>
> The module r.in.gdal offers a common interface for...
> The full map is always imported.
see http://grass.osgeo.org/grass64/manuals/html64_user/rasterintro.html
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