[GRASS-user] Compute volume of water using depth vector points.

[Nagesh Bhatkar]

Dear all,

I imported and digitized a hydrographic chart for depth vector points in 
the ocean and

vector lines along the coast enclosing these ocean waters.
I am looking to  the interpolate these randomly digitized depth points
over a grid of any resolution and then later compute the volume of the 
water in the ocean

channel  between two land masses.
Which modules of GRASS GIS would help me accomplish the above two tasks.

Regards
Nagesh




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[GRASS-user] Is mosaicing 24 bit images possible in Grass 6.2?

[Nagesh Bhatkar]

Dear all,

I intend to mosaic two 24 bit images in LAT LON location.
I imported a 24 bit coloured PNG image in Grass using r.in.gdal in an x-y 
location.
GRASS treated it as a combination of three 8 bit images, one for red, one for 
green,
and one for blue and imported them as three separate maps.

After going through the archives, I tried to use r.patch to combine all the 
three components.
The output of which wasn't a 24bit image but was only one of the components. 
(Not coloured)

d.rgb module does display a coloured 24 bit image after inputing the three 
components to it.

I geocoded them to get non-coloured 8 bit geocoded images in the target 
location.

I did the same for the second 24 bit image.
Mosaicing works fine(i.image.mosaic), but i need to use 8 bit images(24 bit 
images converted to 8 bit images prior to importing, using xv; resolution weak)
or any one of the 8 bit components of a 24 bit image.

Is there a way to mosaic 24 bit images and to output it as a single 24 bit 
image?

Regards
Nagesh


www.nio.org
www.indian-ocean.org
www.reefindia.org
www.coastalhazards.info
www.coastalhazards.in
www.mangroveindia.org
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