1. A method comprising: identifying, by at least one processor, a block of coefficients of a plurality of coefficient blocks generated from a plurality of pixels of a spherical image, the block of coefficients corresponding to a block of pixels of the plurality of pixels and comprising a set of horizontal frequency coefficients; determining, by the at least one processor, a latitude associated with the set of horizontal frequency coefficients, the set of coefficients representing varying levels of horizontal detail; and using, by the at least one processor, the associated latitude to make a determination whether to discard one or more of the coefficients of the block, an identification of a number of coefficients to discard is a function of the associated latitude such that the number increases as the associated latitude's approaches the pole.