[GRASSLIST:3921] Re: worldwide SRTM data now available

Paul Kelly paul-grass at stjohnspoint.co.uk
Thu Jul 15 09:59:38 EDT 2004


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.

Paul




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