--- Michael Traub <[EMAIL PROTECTED]> wrote:
> Hello all,
>
> I have some questions concerning the datafile ETOP60.dx of the bonuspack.
...
> How can I choose an arbitrary area of the world in order to zoom on it?
> Is it possible to convert this plan presentation to a sphere?
I haven't seen this particular example, so I'm not sure about your plot
questions. But mapping the topo (presumably a regular grid) to a cheap sphere
is pretty simple if your positions are lat/lon. Mark("positions"), convert the
lat/lon angles to radians, feed into a Compute with an expression something
like this:
[ cos(a.x)*cos(a.y), sin(a.x)*cos(a.y), sin(a.y) ]
and Unmark NOTE "a" is the positions input, and pi is another input set to the
constant.
Randall
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