frame-1.0.0: The base class of all coordinate frames.

Type: object.

The base class of all coordinate frames.

These objects are designed to be nested in arbitrary ways to build up transformation pipelines out of a number of low-level pieces.

Properties:

name

Type: string. Required.

A user-friendly name for the frame.

axes_order

Type: array of ( integer ).

The order of the axes.

Items:

Type: integer.

axes_names

Type: array of ( string or null ).

The name of each axis in this frame.

Items:

Type: string or null.

Any of:

—

Type: string.

—

Type: null.

reference_frame

Type: baseframe-1.0.0.

The reference frame.

unit

Type: array of ( unit-1.0.0 ).

Units for each axis.

Items:

Type: unit-1.0.0.

axis_physical_types

Type: array of ( string ).

An iterable of strings describing the physical type for each world axis. These should be names from the VO UCD1+ controlled Vocabulary (http://www.ivoa.net/documents/latest/UCDlist.html).

Items:

Type: string.

Examples:

A celestial frame in the ICRS reference frame.

!<tag:stsci.edu:gwcs/celestial_frame-1.0.0>
  axes_names: [lon, lat]
  name: CelestialFrame
  reference_frame: !<tag:astropy.org:astropy/coordinates/frames/icrs-1.1.0>
    frame_attributes: {}
  unit: [!unit/unit-1.0.0 deg, !unit/unit-1.0.0 deg]

A pixel frame in three dimensions

!<tag:stsci.edu:gwcs/frame-1.0.0>
  axes_names: [raster position, slit position, wavelength]
  axes_order: [0, 1, 2]
  axes_type: [SPATIAL, SPATIAL, SPECTRAL]
  name: pixel
  naxes: 3
  unit: [!unit/unit-1.0.0 pixel, !unit/unit-1.0.0 pixel, !unit/unit-1.0.0 pixel]