Snafu

Hello, Could someone can explain how to calculte the deltaV required on a deltaV map? For exemple, We need 4500M/s to arrive on the low Kerbin Orbit. What is the method to find this number? Thanks.

Hello, I'm sorry for my low performance in english/ Do you think it will be relevant to implement a sort of protactor on the orbit map? It will allow to have a departure angle more precise.