I have to build a multi-user web app which is about traffic measurements, prognoses etc. At this point I know that I'll use bar and pie charts.
Unfortunately, those chart types aren't rich in expressing all the data that I collect and compute.
I'm looking for a collection of graphical charts. It is very ok if I have to buy a book or anything else. I need to find some graphical samples with explanations in order to inspire me.
Do you know of any such resource? Do you have any advice for me?