I'll post here before checking on the GMT list; hopefully I can get some
answers from a GRASS/GMT guru...
I've exported a tiff from GRASS using r.out.tiff -t, producing a worldfile in
the process. I then converted the tiff to an 8-bit Sun raster image using
Imagemagick's convert utility (GMT will only import imagery in this format). So
far so good, the image looks fine. My question is how do plot the Sun raster so
that it is correctly georeferenced on my GMT basemap? The GMT program psimage
doesn't have a -R flag with which I may feed it geographical coordinates! And
grd2image is only used for gridding xyz data, not for plotting georeferenced
images.
I already wrote a bash script to extract the upper left coordinates from the
worldfile and then convert these positions into GMT-style -R flag like this:
Worldfile:
10.000000000000000
0.000000000000000
0.000000000000000
-10.000000000000000
710175.000000000000000
5418295.000000000000000
Output from my script:
-54.160355/48.399269/-53.359791/48.860100
But can this information actually be used to imoprt the Sun raster?
Sorry for the off-topic post. I know there are a few GMT users in the GRASS
community, and maybe they have encountered this problem before.
Thanks,
~ Eric.
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