Meaning of "mapped as" in context
Solution 1:
The “Ship Date” is mapped as the “Current Date” for the order.
= The “Ship Date” is mapped [by you] as [if it were] the “Current Date” for the order.
= you should map the "Ship Date" [as if it were] the “Current Date” for the order.
The implication is then that "Ship Date" = "Current Date"