I found that the origin of mrc maps is read correctly and can be used to place one map in respect of another.
For example: 1.mrc (origin: 10,0,0) is going to be shifted 10 pixels with respect of map 0.mrc (origin: 0,0,0).

I can not reproduce the same behavior with CCP4 format (.map) . The origin is not read correctly.

Thank you.