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pychlv
Package pychlv :: Module chlvs :: Class ChLVe
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Class ChLVe

                    object --+    
                             |    
                         _ChLV --+
                                 |
            object --+           |
                     |           |
pygeodesy.named._Named --+       |
                         |       |
pygeodesy.named._NamedBase --+   |
                             |   |
  pygeodesy.ltp.LocalCartesian --+
                                 |
                                ChLVe

Conversion between (WGS84) geodetic and Swiss projection coordinates using the SwissTopo Ellipsoidal approximate formulas and Bolliger, J. pp 148-151 (also GGGS).

Note: Methods ChLVe.forward and ChLVe.reverse have an additional keyword argument gamma=False to approximate the meridian convergence. If gamma=True a 2-tuple (t, gamma) is returned with t the usual result (ChLV9Tuple) and gamma, the meridian convergence (decimal degrees). To convert gamma to grades or gons, use function pygeodesy.degrees2grades.

See Also: Services page 10-11 and older references.

Instance Methods
 
__init__(self, name='Bern')
New ChLVe Ellipsoidal SwissTopo converter, centered at Bern, Ch.
 
forward(self, latlonh, lon=None, height=0, M=None, gamma=False, **name)
Convert (WGS84) geodetic to Swiss projection coordinates.
 
reverse(self, enh_, n=None, h_=0, M=None, gamma=False, **name)
Convert Swiss projection to (WGS84) geodetic coordinates.

Inherited from pygeodesy.ltp.LocalCartesian: __eq__, reset, toStr

Inherited from pygeodesy.named._NamedBase: __repr__, __str__, others, toRepr

Inherited from pygeodesy.named._Named: __format__, __imatmul__, __matmul__, __rmatmul__, attrs, classof, copy, dup, methodname, rename, renamed, toStr2

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

Properties

Inherited from _ChLV: ellipsoid

Inherited from pygeodesy.ltp.LocalCartesian: M, datum, ecef, height0, lat0, latlonheight0, lon0, lon00

Inherited from pygeodesy.named._Named: classname, classnaming, iteration, name, named, named2, named3, named4, sizeof, typename

Inherited from object: __class__

Method Details

__init__ (self, name='Bern')
(Constructor)

 

New ChLVe Ellipsoidal SwissTopo converter, centered at Bern, Ch.

Arguments:
  • name - Optional name=Bern.name (str).
Raises:
Overrides: object.__init__

forward (self, latlonh, lon=None, height=0, M=None, gamma=False, **name)

 

Convert (WGS84) geodetic to Swiss projection coordinates.

Arguments:
  • latlonh - Either a LatLon, Ltp or scalar (geodetic) latitude (degrees).
  • lon - Optional, scalar (geodetic) longitude (degrees) iff latlonh is scalar, ignored otherwise.
  • height - Optional, height, vertically above (or below) the surface of the ellipsoid (meter) iff latlonh and lon are scalar, ignored otherwise.
  • M - If True, return the concatenated rotation EcefMatrix iff available and for ChLV only, None otherwise (bool).
  • name - Optional name=NN (str).
Returns:
A ChLV9Tuple(Y, X, h_, lat, lon, height, ltp, ecef, M) with the unfalsed Swiss Y, X coordinates, Swiss h_ height, the given geodetic lat, lon and height, ecef (Ecef9Tuple) at Bern, Ch, rotation matrix M and ltp this ChLV, ChLVa or ChLVe instance.
Raises:
  • ChLVError - Invalid or non-scalar latlonh, lon or height.
Overrides: pygeodesy.ltp.LocalCartesian.forward
(inherited documentation)

reverse (self, enh_, n=None, h_=0, M=None, gamma=False, **name)

 

Convert Swiss projection to (WGS84) geodetic coordinates.

Arguments:
  • enh_ - A Swiss projection (ChLV9Tuple) or the scalar, falsed Swiss E_LV95 or y_LV03 easting (meter).
  • n - Falsed Swiss N_LV95 or x_LV03 northing (meter) iff enh_ is scalar, ignored otherwise.
  • h_ - Swiss h' height (meter) iff enh_ and n are scalar, ignored otherwise.
  • M - If True, return the concatenated rotation EcefMatrix iff available and for ChLV only, None otherwise (bool).
  • name - Optional name=NN (str).
Returns:
A ChLV9Tuple(Y, X, h_, lat, lon, height, ltp, ecef, M) with the unfalsed Swiss Y, X coordinates, Swiss h_ height, the given geodetic lat, lon and height, ecef (Ecef9Tuple) at Bern, Ch, rotation matrix M and ltp this ChLV, ChLVa or ChLVe instance.
Raises:
  • ChLVError - Invalid or non-scalar enh_, n or h_.
Overrides: pygeodesy.ltp.LocalCartesian.reverse
(inherited documentation)

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