Package pygeodesy :: Module ellipsoids :: Class a_f2Tuple
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Class a_f2Tuple

   object --+        
            |        
        tuple --+    
                |    
   object --+   |    
            |   |    
 named._Named --+    
                |    
named._NamedTuple --+
                    |
                   a_f2Tuple

2-Tuple (a, f) specifying an ellipsoid by equatorial radius (meter) and scalar flattening.


Note: abs(f) < EPS is forced to f = 0, spherical.

See Also: Class Ellipsoid2.

Instance Methods

Inherited from named._NamedTuple: __delattr__, __getattr__, __getitem__, __repr__, __setattr__, __str__, items, iteritems, toRepr, toStr, toStr2

Inherited from tuple: __add__, __contains__, __eq__, __ge__, __getattribute__, __getnewargs__, __getslice__, __gt__, __hash__, __iter__, __le__, __len__, __lt__, __mul__, __ne__, __rmul__, count, index

Inherited from named._Named: _dot_, attrs, classof, copy

Inherited from object: __format__, __init__, __reduce__, __reduce_ex__, __sizeof__, __subclasshook__

Static Methods
a new object with type S, a subtype of T
__new__(cls, a, f)
New _NamedTuple initialized with positional arguments.
Class Variables
  _Names_ = ('a', 'f')
Properties
  b
Get the polar radius (meter), a * (1 - f).
  f_
Get the inverse flattening (float), 1 / f == a / (a - b).

Inherited from named._NamedTuple: iteration

Inherited from named._Named: classname, classnaming, name, named, named2

Inherited from object: __class__

Method Details

__new__ (cls, a, f)
Static Method

 

New _NamedTuple initialized with positional arguments.

Returns: a new object with type S, a subtype of T
Overrides: object.__new__
(inherited documentation)

Property Details

b

Get the polar radius (meter), a * (1 - f).

Get method:
b(self) - Get the polar radius (meter), a * (1 - f).
Set method:
immutable(inst, value) - Throws an AttributeError, always.

f_

Get the inverse flattening (float), 1 / f == a / (a - b).

Get method:
f_(self) - Get the inverse flattening (float), 1 / f == a / (a - b).
Set method:
immutable(inst, value) - Throws an AttributeError, always.