NDDataBase#

class astropy.nddata.NDDataBase[source]#

Bases: object

Base metaclass that defines the interface for N-dimensional datasets with associated meta information used in astropy.

All properties and __init__ have to be overridden in subclasses. See NDData for a subclass that defines this interface on numpy.ndarray-like data.

Attributes Summary

`data`	The stored dataset.
`mask`	Mask for the dataset.
`meta`	Additional meta information about the dataset.
`psf`	Image representation of the PSF for the dataset.
`uncertainty`	Uncertainty in the dataset.
`unit`	Unit for the dataset.
`wcs`	World coordinate system (WCS) for the dataset.

Attributes Documentation

data#: The stored dataset.

mask#

Mask for the dataset.

Masks should follow the numpy convention that valid data points are marked by False and invalid ones with True.

meta#

Additional meta information about the dataset.

Should be dict-like.

psf#

Image representation of the PSF for the dataset.

Should be ndarray-like.

uncertainty#

Uncertainty in the dataset.

Should have an attribute uncertainty_type that defines what kind of uncertainty is stored, such as "std" for standard deviation or "var" for variance.

unit#: Unit for the dataset.

wcs#: World coordinate system (WCS) for the dataset.