Sky2Pix_BonneEqualArea¶

class astropy.modeling.projections.Sky2Pix_BonneEqualArea(theta1=0.0, **kwargs)[source] [edit on github]¶

Bonne’s equal area pseudoconic projection - sky to pixel.

Corresponds to the BON projection in FITS WCS.

$x &= R_\theta \sin A_\phi \\ y &= -R_\theta \cos A_\phi + Y_0$

where:

$A_\phi &= \frac{180^\circ}{\pi R_\theta} \phi \cos \theta \\ R_\theta &= Y_0 - \theta \\ Y_0 &= \frac{180^\circ}{\pi} \cot \theta_1 + \theta_1$

Parameters:

theta1 : float

Bonne conformal latitude, in degrees.

Attributes Summary

`param_names`
`theta1`

Methods Summary

evaluate(phi, theta, theta1)

Attributes Documentation

Methods Documentation

classmethod evaluate(phi, theta, theta1)[source] [edit on github]¶