Hi Micha,
Thanks for your answer.
Can you please specify how I should implement your suggestions? I'm
new to QGIS and only used the GUI interface.
Do you a execute a script in the unix terminal to do these?
Roi
On Sep 18, 2009, at 6:57 AM, Micha Silver wrote:
Roi Granot wrote:
Hi All,
I'm loading Landsat raster image (.tif) and trying to combine it
with maps I created using GMT (.grd). What's the best way to do this?
I tried to first change the Landsat projection to mercator (the
projection I used in GMT) - but the conversion didn't work fine.
You might find better results using GRASS for this. In general the
steps would be:
1- create two GRASS locations, one defined in the source CRS
(matching the Landsat images) and a second in the target CRS,
2- import the Landsat imagery into the first location with r.in.gdal.
3- change to the target location and run r.proj to pull in and
reproject the Landsat image bands.
Also, how can I get rid of the black area surrounding the oblique
Landsat scene (which is filling the image where no data exist) so
that I'll be able to see the background?
Again with GRASS
4- use the r.null model setting the '0' values (black) to NULL.
Worked for me...
5- and finally merge the bands back together with r.composite, and
export back out to a tiff with r.out.tiff
All the above can be done with the GRASS plugin from within QGIS.
--
Micha
Many questions indeed!
Thanks,
Roi
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