astropy:docs

Note

This is an old version of the documentation. See http://docs.astropy.org/en/stable for the latest version.

SphericalRepresentation

class astropy.coordinates.SphericalRepresentation(lon, lat, distance, copy=True)[source] [edit on github]

Bases: astropy.coordinates.BaseRepresentation

Representation of points in 3D spherical coordinates.

Parameters:

lon, lat : Quantity

The longitude and latitude of the point(s), in angular units. The latitude should be between -90 and 90 degrees, and the longitude will be wrapped to an angle between 0 and 360 degrees. These can also be instances of Angle, Longitude, or Latitude.

distance : Quantity

The distance to the point(s). If the distance is a length, it is passed to the Distance class, otherwise it is passed to the Quantity class.

copy : bool, optional

If True arrays will be copied rather than referenced.

Attributes Summary

attr_classes Dictionary that remembers insertion order
distance The distance from the origin to the point(s).
lat The latitude of the point(s).
lon The longitude of the point(s).
recommended_units

Methods Summary

from_cartesian(cart) Converts 3D rectangular cartesian coordinates to spherical polar coordinates.
represent_as(other_class)
to_cartesian() Converts spherical polar coordinates to 3D rectangular cartesian coordinates.

Attributes Documentation

attr_classes = OrderedDict([(u'lon', <class 'astropy.coordinates.angles.Longitude'>), (u'lat', <class 'astropy.coordinates.angles.Latitude'>), (u'distance', <class 'astropy.units.quantity.Quantity'>)])
distance

The distance from the origin to the point(s).

lat

The latitude of the point(s).

lon

The longitude of the point(s).

recommended_units = {u'lat': Unit("deg"), u'lon': Unit("deg")}

Methods Documentation

classmethod from_cartesian(cart)[source] [edit on github]

Converts 3D rectangular cartesian coordinates to spherical polar coordinates.

represent_as(other_class)[source] [edit on github]
to_cartesian()[source] [edit on github]

Converts spherical polar coordinates to 3D rectangular cartesian coordinates.