Re: [Gnuplot-info] 2-D Intensity Plots of Titan

[<br...@ph...>]

Jeff Sadino wrote:

> I am trying to map the surface of Saturn's largest moon, Titan for a
> NASA summer research project.  As a rough draft, I would like to plot
> the temperature (colored red) at the longitude(x) and latitude(y)
> coordinates.  My data file is tab delimited in three columns (x,y,T).
> I am also missing some x,y locations, which I would like to leave
> blank.

So you want big, false-coloured point symbols wherever you have data.
No interpolation in between, no smoothing, nothing.  In that case

	splot 'data' u 1:2:3 with points palette pointsize 10

or something like that, in any reasonably current gnuplot, should do it.

> points.  Finally, I would like to be able to plot this not on a
> rectangular cartesion coordinate system, but on a planetographic
> (global projection) coordinate system.

See 'world.dem' to learn about handling of spherical data.