How to draw up the plan of the concert hall?

Question

Layout

There is a plan of the hall: It is

necessary to draw up this plan with the possibility of choosing a sector, and then a specific place from this sector.
The difficulty is that I cannot make up the sectors because of their shape.
How can this thing be implemented?

Answer 1

I recently did this for a ticketing service.
Step by step:
Somehow, and not otherwise))

Answer 2

If with a choice of place, then a library is needed to work with graphics. for example paperjs (or any other, I just used this one). Just a picture to do - well, what's the point? This is the same as giving the customer a picture of the site instead of the site. After all, your picture should also process click events and show which places are occupied, which ones cost how much, etc. And you or the developer will still have to implement this using the means of a specific library, that is, what you hand over as a drawing will have to be re-written, but in the form of code.