[Qgis-user] one raster from tiles

[Jacolin Yves]

Hi Lionel,

So this doc about GDAL-ogr in french will be usefull ;)

http://softlibre.gloobe.org/doku.php?id=gdal_ogr:couteau_suisse:start

Y.
Le Monday 21 April 2008 15:51:19 Lionel Roubeyrie, vous avez écrit :
> Big thanks Yves for pointing gdal (never thinking at all for it), there's a
> special command to merge multiple tiles into one with gdal_merge.py.
> Keep gdaltindex under the pillow :-)
>
> Le lundi 21 avril 2008, Jacolin Yves a écrit :
> > Le Monday 21 April 2008 14:04:39 Lionel Roubeyrie, vous avez écrit :
> > > Hi all,
> > > I have several tiles rasters (geotiff) describing a large area in high
> > > resolution, and generally I work on a small area, having to import all
> > > tiles because they don't have explicit names (and without the
> > > possibility to put them directly under a group (see a previous post),
> > > which should be a great improvement).
> > > Then, is it possible to extract/create a new raster for the desired
> > > area with QGIS/GRASS (know it's possible with Arcmap, with
> > > difficulties) ? Thanks
> >
> > Hi Lionel,
> >
> > You can use gdaltindex to create an indexof your tile in shapefile
> > format, after displaying it you can show the "location" field on your map
> > and find the filename of the Raster you have to load for your area.
> >
> > If you want to extract an area from your raster you can again use gdal
> > [1] with some option to cut all data out of your area. I think you can
> > use g.region to zoom into your area and then export the raster from your
> > view region, after creating one main raster.
> >
> > I am agreeing with you for a better group management ;) May I need to
> > create a new ticket? Another possibility should be that QGIS manage index
> > file.
> >
> > Y.




-- 
Yves Jacolin
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Géomaticien

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