Pix2Sky_Mercator

class astropy.modeling.projections.Pix2Sky_Mercator(*args, **kwargs)

Bases: Pix2SkyProjection, Cylindrical

Mercator - pixel to sky.

Corresponds to the MER projection in FITS WCS.

\[\begin{split}\phi &= x \\ \theta &= 2 \tan^{-1}\left(e^{y \pi / 180^{\circ}}\right)-90^{\circ}\end{split}\]