A 750 version s_left s_right t_bottom t_top 0 6 0 196 // comment: altitude 10000 6 12 0 196 // comment: altitude 1000 12 18 0 196 // comment: altitude 100 18 30 9 66 // comment: altitude 10 (20 feet of increment) 100 // comment: feet per tickmark (small) 500 // comment: feet per tickmark (big) 200 // comment: feet per label 0.15 // comment: pixels per foot