The hash is just a number regardless-- surely no one has any problem understanding any other number in the protocol as a number! :)
(I should have probably used 32 octets so that it fits neatly in 256 bits)
The "mapping" you may be referring to is happening outside and subject to how your brain /your browser interpret it. (How do you know that when I posted the comment, that I didn't supply the raw bits of the number?! ;-))
Anyway, it was just a joke for low level-programmers I guess. Have a good day ;-)