BaseGeodeticRepresentation

class astropy.coordinates.BaseGeodeticRepresentation(lon, lat=None, height=None, copy=True)

Bases: BaseRepresentation

Base class for geodetic representations.

Subclasses need to set attributes _equatorial_radius and _flattening to quantities holding correct values (with units of length and dimensionless, respectively), or alternatively an _ellipsoid attribute to the relevant ERFA index (as passed in to erfa.eform). The geodetic latitude is defined by the angle between the vertical to the surface at a specific point of the spheroid and its projection onto the equatorial plane.

Parameters:

lon, latastropy:angle-like

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 and either Longitude not Latitude, depending on the parameter.

heightQuantity [:ref: ‘length’]

The height to the point(s).

copybool, optional

If True (default), arrays will be copied. If False, arrays will be references, though possibly broadcast to ensure matching shapes.

Attributes Summary

attr_classes
name	Name of the representation or differential.

Methods Summary

from_cartesian(cart)	Converts 3D rectangular cartesian coordinates (assumed geocentric) to geodetic coordinates.
to_cartesian()	Converts geodetic coordinates to 3D rectangular (geocentric) cartesian coordinates.

Attributes Documentation

attr_classes = {'height': <class 'astropy.units.quantity.Quantity'>, 'lat': <class 'astropy.coordinates.angles.core.Latitude'>, 'lon': <class 'astropy.coordinates.angles.core.Longitude'>}

name = 'basegeodetic'

Name of the representation or differential.

When a subclass is defined, by default, the name is the lower-cased name of the class with with any trailing ‘representation’ or ‘differential’ removed. (E.g., ‘spherical’ for SphericalRepresentation or SphericalDifferential.)

This can be customized when defining a subclass by setting the class attribute.

Methods Documentation

classmethod from_cartesian(cart)

Converts 3D rectangular cartesian coordinates (assumed geocentric) to geodetic coordinates.

to_cartesian()

Converts geodetic coordinates to 3D rectangular (geocentric) cartesian coordinates.