Generally we say that map and load are two ways of looking at the same thing (for a given rpm).
maybe this will help you with the relationship between map and load:
ALDL revealed and TPS conversions
If LV8 is the load variable in counts, then:
Vacuum = 80 - (5/16)*LV8 Kpa
1 ATM MAP = 20 + (5/16)*LV8 Kpa
2 ATM MAP = 30 + (5/8)*LV8 Kpa
TPS(in % open) = (25/64)*LV8
Load = (5/16)*LV8