Pix2Sky_CylindricalEqualArea

class astropy.modeling.projections.Pix2Sky_CylindricalEqualArea(*args, **kwargs)

Bases: Pix2SkyProjection, Cylindrical

Cylindrical equal area projection - pixel to sky.

Corresponds to the CEA projection in FITS WCS.

\[\begin{split}\phi &= x \\ \theta &= \sin^{-1}\left(\frac{\pi}{180^{\circ}}\lambda y\right)\end{split}\]

Parameters:

lampython:float

Radius of the cylinder in spherical radii, λ. Default is 1.

Attributes Summary

lam
param_names	Names of the parameters that describe models of this type.

Attributes Documentation

lam = _ParameterDS('lam', value=1.0)

param_names = ('lam',)

Names of the parameters that describe models of this type.

The parameters in this tuple are in the same order they should be passed in when initializing a model of a specific type. Some types of models, such as polynomial models, have a different number of parameters depending on some other property of the model, such as the degree.

When defining a custom model class the value of this attribute is automatically set by the Parameter attributes defined in the class body.