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

[John Stevenson]

Hamish wrote:
>> Eric wrote:
>>     
>>> I'll post here before checking on the GMT list;
>>> hopefully I can get some answers from a GRASS/GMT guru...
>>>       
>
> Moritz wrote:
>   
>> I can't help you on your precise questions, but have you seen
>> Dylan's article:
>> http://casoilresource.lawr.ucdavis.edu/drupal/node/561
>> (see link to pdf on that page) ?
>>     
>
> and of course the GRASS Wiki:
>   http://grass.osgeo.org/wiki/GMT
>
> (which of course forever needs updating)
>
>
>
> Hamish
>
>
>
>       
>
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>   
By a tiff, do you mean a georeferenced map? I've plotted aerial photos 
that I rectified in GRASS using the following to export the RGB bands:

r.mapcalc "image.red=r#image; image.green=g#image; image.blue=b#image"
r.out.bin -h input=image.red output=image.red.grd
r.out.bin -h input=image.green output=image.green.grd
r.out.bin -h input=image.blue output=image.blue.grd

Followed by:

grdimage image.red.grd image.green.grd image.blue.grd -J -R -B ...etc.

I've just put the same workflow onto the wiki.  I've also used r.his to 
make coloured shaded relief maps, and plotted them in GMT using the same 
method.  I don't think that it is the optimal method, but at least it 
preserved my colour rules.

Cheers

John

-- 


Dr John Stevenson
Postdoctoral Research Associate
School of Earth, Atmospheric and Environmental Sciences
Williamson Building (Room 2.42)
University of Manchester
Manchester M13 9PL, UK
tel. +44(0)161 306 6585; fax. +44(0)161 306 9361;
john.stevenson at manchester.ac.uk