NDDataBase

class astropy.nddata.NDDataBase

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.

See also: https://docs.astropy.org/en/stable/nddata/

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.