RE: [GRASS-user] Off Topic: Importing GRASS tiffs to GMT

Eric:

I found a posting by Allen Cogbill on the GMT mailing list last night,
and with a lot of clunky tweaking, worked for me:

1. Convert the .tif file to a Sun Rasterfile (I use ImageMagick).

[

2. Use Unix tools to read the .tfw file that accompanies the .tif
file and calculate the real-world coordinate extrema.
3. Using g.region or imagemagick's identify, list the number of rows
and columns, and along with the image resolution, calculate
the N-S-E-W extents.
4. Once real-world extents are known,

]

gdalinfo will do all that for you from the geotiff, or from g.region at
time of export.

beware the dreaded cell-center vs grid-center convention issues.

use your psbasemap mapping scale to calculate image width and height
on paper.
5. Pass this information to psimage -W.

As long as the region defined in psbasemap's -R flag is identical to
the region of the generated tiff from GRASS, the image will plot
correctly.

Hamish