In Rudrayamala Tantram, bhuvaneswari yantra is described like below.
In another famous book on mahavidyas -
The Ten Great Cosmic powers, by S Sankaranarayan
, the yantra is depicted as below, 8 petals in the outer ring instead of 16 as mentioned in Rudryamal.
Am I misinterpreting the text? Or is one of them incorrect? and which one?