|Buddhist cosmology: Mt. Sumerus run through the center of "world-systems" or galaxies like our own and are surrounded by "continents" or planetary clusters (Wisdom Quarterly).|
ANSWER: Sumeru is the name of the galactic center in Buddhist cosmology. So it is in the center of the Milky Way as seen from outside of it, a sight attainable through meditative development.
Mandalas such as those used as the foundation for Buddhist temples, such as Angkor Wat in Cambodia or Boudanath in Nepal, are laid out in a pattern reflecting the Buddhist conception of our world in the multiverse.
|Boudanath Mandala/Pagoda, Nepal (Gulmuhor)|
Mt. Sumeru could never refer to a mountain on this planet, which may have its own mini Meru in the invisible lines of magnetic force emanating from the poles of this living Bhumi (Gaia).
Of course, all of this is speculative and remains unsettled.
The first problem is determining the meaning of a popular ancient Indian measure of distance, the yojana. The most sensible meaning is the distance a draught ox can travel before needing to be un-yoked. This is or was roughly seven miles in agrarian Greater India (Bharat). Even then it was a colloquial generalization, never an exact measure.
|Space with innumerable inhabited worlds in all 10,000 directions (wallpapervortex.com)|
Likewise the "continents," as also shown in the insert (2-5), are habitable worlds (lokas, worlds) on this "human" plane, with its ill-born, ghosts, titans, animals of all kinds, humans, devas, and brahmas.