xy2spherical#

InverseStereographicProjection.xy2spherical(x: float | ndarray, y: float | ndarray, degrees: bool = False) → Tuple[ndarray, ndarray][source]#

Return spherical coordinates, azimuth \(phi\) and polar \(theta\), defined as in the ISO 31-11 standard [Weisstein, 2005], from stereographic coordinates (X, Y).

Parameters:

x: X coordinates.
y: Y coordinates.
degrees: If True, the given angles are returned in degrees. Default is False.

Returns:

azimuth: Azimuth spherical coordinate corresponding to (X, Y). Whether the coordinates for the upper or lower hemisphere points are returned is controlled by pole (-1 = upper, 1 = lower).
theta: Polar spherical coordinate corresponding to (X, Y). Whether the coordinates for the upper or lower hemisphere points are returned is controlled by pole (-1 = upper, 1 = lower).