The Saturn observation form can be found here:
Some time around 2001 in connection with Iván Éder's Saturn drawing I was faced with the fact that the actual Saturn observation form was inaccurate. The markers used for the rings were on wrong places. Furthermore they needed to be removed from the paper with a knife at the end if you didn't want them to spoil the drawing. That old observing form didn't even indicate the outline of the ring. The newer observation forms of the Hungarian Astronomical Association indicate the ring but the basic problem is that we see the planet and its rings at a different angle every day. So in theory an infinite number of observation forms would be needed. The solution I've seen everywhere is there are a couple of ready forms (3 - a good dozen). But if the real tilt of the rings visible in the telescope doesn't match that of the preprinted form then I think the drawing is not good.
So far the lack of a proper observation form kept me from drawing Saturn. I don't have a single drawing of the ringed planet that would be worth mentioning. But some day I would like to make a nice drawing of Saturn.
So I needed an observation form that shows the Saturn globe and the rings for an arbitrary tilt angle. It also needed to be vector graphics so that it can be enlarged arbitrarily without ever getting pixelated. I wanted many options so that the form can be modified to be appropriate for any telescope size and printer.
Then it was time to realise the project. Of course a few smaller problems arose during coding but overall it was pretty straighforward.
The advantage of the online form is that it is accessible for others as well.