Clipping a series of overlapping elipses

Hi @johnm, I found two possible ways. Assuming that the attribute called "Name" stores sequential number of the cyclone in the time ascending order.

A:

B:

Hope this helps.

Hi @takashi ,Thanks for this I will give it a go. The name attribute is just a substitute for the ascending timestamp attribute which is what you normally get for a cyclone. I had also worked out a rough solution that involved the AreaOnAreaOverlayer then a Dissolver(Group by Name) into a DonutHoleExtractor, but your solution looks much more elegant. Cheers, John

Hi @johnm

The other way I would try is the SliverRemover transformer. A SliverRemover takes the overlap and assigns it to one of the overlapping features (I'm assuming you don't just want to cut it out completely).

Here is my workspace:

I use a SliverRemover with a priority attribute, which for your data is name. However, the result is the reverse of what I think you want. So first I create Name2, which is Name in the reverse order (it's not a great method here - hard coded at 5 features - but let's see if the SliverRemover is giving what you want before we worry too much).

The results:

I hope this helps. The SliverRemover isn't well known - and this isn't really what it's intended for - but I think it does a good job. If it's not correct, could you post a screenshot of what a correct output would look like?

Cheers

Mark

cyclone-graphics.zipHi @Mark2AtSafe Thanks for your reply. The second solution by takashi seems to be the best for me which I have reproduced below. I have attached a more realistic example where in this case the attribute to order is FCASTTIME which is actually a timestamp attribute for a specific Cyclone. Cheers, John

@johnm

There is a more direct way to do it.

reates the "moonlets"