[GRASS5] SG3d-keep-it

[Helena Mitasova - staff]

>Therefore, the only reason to keep SG3d would be due to
>functionality not in NVIZ. 

Yes, that is a very, very good reason.

>I didn't look carefully at the two programs so I'm
>not sure, but I think NVIZ does everything SG3d did and more.

Unfortunately this is not true - in many aspects NVIZ does more,
however, NVIZ lacks LEGENDS which anybody who needs to use 
the images for publications and reports desperately needs and
SG3d has very good tools for legends as well as for scale and North
symbols. Also SG3d has powerful tools for visualization of site
data using different symbols, colormaps and labels. So untill
there is a volunteer who could port these capabilities to NVIZ
please keep SG3d in GRASS so that at least the users who have
SGIs can take advantage of these capabilities. Also, SG3d allows
the users who are working with just one surface work more
efficiently - it is simply faster to use and we use it all the time.

And when I am writing this a better candidate for retirement would
be s.surf.tps which has been replaced by more powerful s.surf.rst
And r3.in.grid3 probably does not have too many users, because it
was a temporary 3d grid format which we have used to develop and 
test the 3D and 4D interopolation and visualization. 
It is nice to have it there in case we need to look at some older 
files but this format is not of a great importance to wider
users community.

Helena

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