How to upload flowcharts?

I'm writing an article about working in Switzerland. To answer the question "What permit do I need," I think a flowchart would work really well. I also haven't seen any other page do that, so I think it'd be a great way to stand out, too.

Although this is just one section in the article, it's a really important one. I want Google to be able to recognize that I have all the info in that flowchart. How do I best upload it? Just as a normal image? Custom code?

Cheers!
—Pat