I've come across in several places (literature, personal testimonies, etc) that people in deep meditation, their 'spirit' leaves their physical body to travel to other dimensions. Yogi masters, monks, mystics, etc all have discovered and learned profound wisdom during this time of meditation. Some even meditate continuously for months/years like Buddha boy. Some have traveled to the 22nd dimension and above and met/spoke with the Source/God.

So my question: Is meditation a form of projection? How's it different from astral projection as taught by AP and MAP? How are the techniques similar/different?