Package pygeodesy :: Package auxilats :: Module auxLat :: Class AuxLat

Class AuxLat

   object --+        
            |        
 named._Named --+    
                |    
auxAngle.AuxAngle --+
                    |
                   AuxLat

Known Subclasses:

auxDLat.AuxDLat

Base class for accurate conversion between Auxiliary latitudes on an ellipsoid.

Latitudes are represented by AuxAngle instances in order to maintain precision near the poles, Authalic latitude Xi, Conformal Chi, Geocentric Theta, Geographic Phi, Parametric Beta and Rectifying Mu.

See Also: Karney's C++ class AuxLatitude.

Instance Methods

__init__(self, a_earth=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran..., f=None, b=None, name='', **ALorder)
New AuxLat instance on an ellipsoid or datum.

Authalic(self, Phi, **diff_name)
Convert Geographic to Aunthalic latitude.

AuthalicRadius2(self, exact=False, f_max=0.1)
Get the Authalic radius squared.

Conformal(self, Phi, **diff_name)
Convert Geographic to Conformal latitude.

convert(self, auxout, Zeta_d, exact=False)

Geocentric(self, Phi, **diff_name)
Convert Geographic to Geocentric latitude.

Geodetic(self, Phi, **diff_name)
Convert Geographic to Geodetic latitude.

Parametric(self, Phi, **diff_name)
Convert Geographic to Parametric latitude.

Reduced(self, Phi, **diff_name)
Convert Geographic to Parametric latitude.

Rectifying(self, Phi, **diff_name)
Convert Geographic to Rectifying latitude.

RectifyingRadius(self, exact=False)
Get the Rectifying radius.

Inherited from auxAngle.AuxAngle: __abs__, __add__, __bool__, __eq__, __float__, __iadd__, __isub__, __ne__, __neg__, __pos__, __radd__, __rsub__, __str__, __sub__, copyquadrant, normal, toBeta, toChi, toMu, toPhi

Inherited from named._Named: __imatmul__, __matmul__, __repr__, __rmatmul__, attrs, classof, copy, dup, methodname, rename, toRepr, toStr, toStr2

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Static Methods
Inherited from `auxAngle.AuxAngle`: `fromDegrees`, `fromLambertianDegrees`, `fromLambertianRadians`, `fromRadians`

Properties
	a Get the `ellipsoid`'s equatorial radius (`meter`, conventionally).
	equatoradius Get the `ellipsoid`'s equatorial radius (`meter`, conventionally).
	ALorder Get the AuxLat order (`int`, 4, 6 or 8).
	b Get the `ellipsoid`'s polar radius (`meter`, conventionally).
	polaradius Get the `ellipsoid`'s polar radius (`meter`, conventionally).
	ellipsoid Get the ellipsoid (Ellipsoid).
	f Get the `ellipsoid`'s flattening (`scalar`).
	flattening Get the `ellipsoid`'s flattening (`scalar`).
Inherited from `auxAngle.AuxAngle`: `diff`, `iteration`, `normalized`, `tan`, `toDegrees`, `toLambertianDegrees`, `toLambertianRadians`, `toRadians`, `x`, `y` Inherited from `named._Named`: `classname`, `classnaming`, `name`, `named`, `named2`, `named3`, `named4`, `sizeof` Inherited from `object`: `__class__`

Method Details

init (self, a_earth=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran`...`, f=None, b=None, name='', **ALorder)
(Constructor)

New AuxLat instance on an ellipsoid or datum.

Arguments:

a_earth - Equatorial radius, semi-axis (meter) or an ellipsoid or datum (Datum, Ellipsoid, Ellipsoid2 or a_f2Tuple).
f - Flattening: (a - b) / a (float, near zero for spherical), ignored if a_earth is not scalar.
b - Optional polar radius, semi-axis (meter, same units as a_earth), ignored if a_earth is not scalar.
ALorder - Optional keyword arguments ALorder to set AuxLat's order, see property ALorder.
name - Optional name (str).

Raises:

AuxError - Invalid y_angle, x or aux.

Overrides: object.__init__

Authalic (self, Phi, **diff_name)

Convert Geographic to Aunthalic latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Parametric latitude, Beta (AuxAngle).

AuthalicRadius2 (self, exact=False, f_max=0.1)

Get the Authalic radius squared.

Arguments:

exact - If True, use the exact expression, otherwise the Taylor series.
f_max - Flattening not to exceed (float).

Returns:

Authalic radius squared (meter squared, same units as the ellipsoid axes).

Raises:

AuxError - If exact=False and abs(flattening) exceeds f_max.

Conformal (self, Phi, **diff_name)

Convert Geographic to Conformal latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Conformal latitude, Chi (AuxAngle).

Geocentric (self, Phi, **diff_name)

Convert Geographic to Geocentric latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Geocentric latitude, Phi (AuxAngle).

Geodetic (self, Phi, **diff_name)

Convert Geographic to Geodetic latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Geodetic latitude, Phi (AuxAngle).

Parametric (self, Phi, **diff_name)

Convert Geographic to Parametric latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Parametric latitude, Beta (AuxAngle).

Reduced (self, Phi, **diff_name)

Convert Geographic to Parametric latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Parametric latitude, Beta (AuxAngle).

Rectifying (self, Phi, **diff_name)

Convert Geographic to Rectifying latitude.

Arguments:

Phi - Geographic latitude (AuxAngle).

Returns:

Rectifying latitude, Mu (AuxAngle).

RectifyingRadius (self, exact=False)

Get the Rectifying radius.

Arguments:

exact - If True, use the exact expression, otherwise the Taylor series.

Returns:

Rectifying radius (Meter, same units as the ellipsoid axes).

Property Details

a

Get the ellipsoid's equatorial radius (meter, conventionally).

Get method:: a(self) - Get the ellipsoid's equatorial radius (meter, conventionally).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

equatoradius

Get the ellipsoid's equatorial radius (meter, conventionally).

Get method:: a(self) - Get the ellipsoid's equatorial radius (meter, conventionally).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

ALorder

Get the AuxLat order (int, 4, 6 or 8).

Get method:: ALorder(self) - Get the AuxLat order (int, 4, 6 or 8).
Set method:: ALorder(self, order) - Set the AuxLat order (int, 4, 6 or 8).
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

b

Get the ellipsoid's polar radius (meter, conventionally).

Get method:: b(self) - Get the ellipsoid's polar radius (meter, conventionally).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

polaradius

Get the ellipsoid's polar radius (meter, conventionally).

Get method:: b(self) - Get the ellipsoid's polar radius (meter, conventionally).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

ellipsoid

Get the ellipsoid (Ellipsoid).

Get method:: ellipsoid(self) - Get the ellipsoid (Ellipsoid).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

f

Get the ellipsoid's flattening (scalar).

Get method:: f(self) - Get the ellipsoid's flattening (scalar).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

flattening

Get the ellipsoid's flattening (scalar).

Get method:: f(self) - Get the ellipsoid's flattening (scalar).
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.

Class AuxLat

__init__ (self, a_earth=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran..., f=None, b=None, name='', **ALorder) (Constructor)

Authalic (self, Phi, **diff_name)

AuthalicRadius2 (self, exact=False, f_max=0.1)

Conformal (self, Phi, **diff_name)

Geocentric (self, Phi, **diff_name)

Geodetic (self, Phi, **diff_name)

Parametric (self, Phi, **diff_name)

Reduced (self, Phi, **diff_name)

Rectifying (self, Phi, **diff_name)

RectifyingRadius (self, exact=False)

a

equatoradius

ALorder

b

polaradius

ellipsoid

f

flattening

init (self, a_earth=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran`...`, f=None, b=None, name='', **ALorder)
(Constructor)