Hi Godpole,

The easiest way that I can think of doing this is by creating a heightmap and then rendering it out in a 3d application.

I suggest that to make the heightmap you download terrain editor (free) from here: http://hme.sourceforge.net/
This will allow you to make your heightmap by using clear colours rather than having to distinguish between barely discernible shades of grey - you would put your contour information in here.

Once you are happy with the heightmap then you can load it as a terrain in something like Bryce (also available for free) and view it in 3d.