"Jeff" <jef### [at] gmailcom> wrote:

You just need to hit F1 and type in image_map.
or search around the web
http://www.joshuarenglish.com/cyclopedia/image_planar.html
http://www.f-lohmueller.de/pov_tut/tex/tex_870e.htm


> another question is , is it possible to rotate, zoom in and zoom out freely in
> POV-RAY?

Of course.  Read the docs on the camera {}
You can zoom in, out, rotate, pan, translate, change camera angle, and use all
sorts of different camera types other than the usual perspective camera.

> i mean, when you have thousands or even millions nodes and links and its so many
> of em, that you need to put your camera far far away, but then the nodes and
> links are sooooo small.

Yes, that's a problem with a whole field of study - presentation, analysis, and
visualization of multidimensional data.

> so, how to deliver the information effectively that people can see all of the
> nodes and links, but at the same time its not too small (or too hard) to see?
> is there any solutions to solve this problem in POV-RAY?

There's the size of the nodes, the thickness of the connecting lines, the
contrast between those and the background, etc.

> so, how did you do it in your experience that you have done it with millions of
> em?

Well, you have to determine what you want to show, and why.
Then you have to do the math to place the camera and adjust the view angle and
zoom.

I'd work on just getting the simple overlays to look good, as that will likely
take some time to get scaled and transparently overlaid properly.
Then see how all the data points look once they're all plotted on the map(s)

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