Trying to put lines in AI on a topographical map

Hi,

Apologies for my beginner question, as i am new to AI (played with it on and off for a few different things).

I have this topographical map (with lots of counters lines) and what I am wanting to do, is make each of the topographical line a line on AI. Which I will be able to export so that I can laser cut them out, for a project.

I know i can manually draw the lines but that would take a lot of work, and my guess it that there would have to be a better way to be able to do it.

The link below (one to google dive) you can download the AI for what i have done so for.

https://drive.google.com/open?id=1tZZ0ZR0DFclFiYdSVQeOPRBEsgfPM0ca

I am fully aware that the IMG file is not at the best quality level, because i don't know how to just got the part that i am after i took capures of just the part i am after. the next link is to the original digital version of the of the area. https://drive.google.com/open?id=1q0R1eqQdjCo-X5JQ0PJ4GeFzhmJs5vuZ  (see my Current AI project to see the area i am after)

Thanks Followspot

Any help would be greatly appropriated