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On 04/02/2012 09:47 AM, Paolo Cavallini wrote:
<blockquote cite="mid:4F795996.2010604@faunalia.it" type="cite">On
30/03/2012 23:19, Victor Olaya wrote:
<br>
<br>
<blockquote type="cite">Well, the idea is just the opposite: to
use any raster or vector layer
<br>
in GRASS, directly from QGIS. "Any" in this context means any
"normal"
<br>
</blockquote>
<br>
Please remember also that it is possible to use rasters in GRASS
without importing them, but just registering them (r.external),
with insignificant loss of performances. Thus, we can more or less
forget about grass rasters in their native format, for most of the
uses.
<br>
All the best.
<br>
</blockquote>
<br>
Just to be clear, I assume you mean here that there is no need to
convert (import) other raster layers to GRASS layers in order to use
GRASS functions? I am asking because this option doesn't help the
user who has his/her data in a GRASS database.<br>
<br>
For me the strict and transparent handling of region settings and
projection has always been one of the strong points of GRASS, and I
am curious how the workflow will be when working with external
rasters. Like with internal rasters, an external raster layer does
need to be in the same projection as the current location.
Furthermore, raster functions use the region settings (extend,
resolution) of the current mapset as far as I understand. <br>
<br>
When importing, it is possible to create a new location on the fly
based on the raster you are importing. This makes it easier to deal
with the above (I think), e.g., by creating a temporary location. I
am not sure linking an external raster offers the same option (I had
a quick look, but can't find the option, but maybe I just overlooked
it). But then, the normal import function allows to create a
location based on a raster without actually importing the raster. So
the two could be combined.<br>
<br>
<br>
<br>
<br>
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