3d plot of earth with cut

If you have "value" as a function of latitude and radius, isn't that a
2D (not 3D) scalar field?
Which can be plotted using a regular heatmap.

If you want a curved edge where depth=0 (radius=?), that's not too
difficult to achieve.
Not quite sure what continent boundaries mean in this context, but
that could possibly be added to.

Or do you want a 2D slice superimposed within a 3D space?

And if so, does it need to be dynamic?
(i.e. Rotate the whole thing, with a trackball/mouse).

Note that the further you go down the list above, the more work is required.

Hello,

Could someone suggest a package/way to make a 3D raster plot of the Earth
(with continent boundaries), and then make a "cut" or "slice" of it such
that one can also visualize some scalar quantity as a function of the
Radius/Depth across that given slice ?

Formally, I would have a given, fixed longitude, and a list of vectors
{latitude, radius, Value}
that would show the distribution of the quantity "Value" at various depths
and latitudes in 3D.

Thanks a lot in advance,
Balint

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