Sky2Pix_Mercator#
- class astropy.modeling.projections.Sky2Pix_Mercator(*args, **kwargs)[source]#
Bases:
Sky2PixProjection
,Cylindrical
Mercator - sky to pixel.
Corresponds to the
MER
projection in FITS WCS.\[\begin{split}x &= \phi \\ y &= \frac{180^{\circ}}{\pi}\ln \tan \left(\frac{90^{\circ} + \theta}{2}\right)\end{split}\]