[GRASSLIST:3932] Re: worldwide SRTM data now available

[Markus Neteler]

On Thu, Jul 15, 2004 at 02:59:38PM +0100, Paul Kelly wrote:
> On Thu, 15 Jul 2004, Hamish wrote:
> 
> [...]
> >Resulting snapshot is attached.
> >
> >
> >To make it look good in NVIZ, I had to scale it with:
> >r.mapcalc "etopo2_scaled=etopo2/(60*1852.0)"
> >
> >This makes the XYZ into degrees*deg*deg instead of deg*deg*meters;
> >then you need to redo the colors.
> >
> >Perhaps a better solution in NVIZ is called for when dealing with
> >lat/lon projections? Assume meters? see shade.clr.sh fix for this.
> >
> 
> If you have access to a Silicon Graphics machine, SG3d can project 
> lat/long locations onto a spherical globe, which looks very nice for this 
> kind of thing. I am not in the lab today but will try it the next time.

The xtraceroute software
 http://www.dtek.chalmers.se/~d3august/xt/
 License: GPL
is able to project on a sphere - maybe that could be
used for NVIZ?

Markus