One approach would be to ignore them. It's a graphic tool to compare the two profiles. Once the highest point of each profile and the ground line are co-incident, measure everything relative or proportional to the vehicle's profile.
Else you could consider the top numbers to be tangential angles (to horizontal) and the lower ones to be station points.
...errr, what skyking said.
What I actually do IRL is use redwood benderboard and an angle of 45° (~22° twice) as the tip angle and then slide it back and forth until it looks like the template.
