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PyGeodesy
Package pygeodesy :: Module ltp :: Class ChLV
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Class ChLV

              object --+    
                       |    
                   _ChLV --+
                           |
  object --+               |
           |               |
named._Named --+           |
               |           |
named._NamedBase --+       |
                   |       |
      LocalCartesian --+   |
                       |   |
                     Ltp --+
                           |
                          ChLV

Conversion between WGS84 geodetic and Swiss projection coordinates using pygeodesy.EcefKarney's Earth-Centered, Earth-Fixed (ECEF) methods.

See Also: Swiss projection formulas, page 7ff, NAVREF, REFRAME and SwissTopo Scripts GPS WGS84 <-> LV03.

Instance Methods
 
__init__(self, latlonh0=Bern(lat=46.952406, lon=7.439583, height=49.55, datum=Datum(na..., **other_Ltp_kwds)
New ECEF-based WGS84-Swiss ChLV converter, centered at Bern, Ch.
 
forward(self, latlonh, lon=None, height=0, M=None, **name)
Convert WGS84 geodetic to Swiss projection coordinates.
 
reverse(self, enh_, n=None, h_=0, M=None, **name)
Convert Swiss projection to WGS84 geodetic coordinates.

Inherited from LocalCartesian: __eq__, reset, toStr

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

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

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

Static Methods
 
false2(Y, X, LV95=True, **name)
Add the Swiss LV95 or LV03 falsing.
 
isLV03(e, n)
Is (e, n) a valid Swiss LV03 projection?
 
isLV95(e, n, raiser=True)
Is (e, n) a valid Swiss LV95 or LV03 projection?
 
unfalse2(e, n, LV95=None, **name)
Remove the Swiss LV95 or LV03 falsing.
Class Variables
  Bern = Bern(lat=46.952406, lon=7.439583, height=49.55, datum=D...
Properties

Inherited from Ltp: ecef

Inherited from LocalCartesian: M, datum, ellipsoid, height0, lat0, latlonheight0, lon0, lon00

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

Inherited from object: __class__

Method Details

__init__ (self, latlonh0=Bern(lat=46.952406, lon=7.439583, height=49.55, datum=Datum(na..., **other_Ltp_kwds)
(Constructor)

 

New ECEF-based WGS84-Swiss ChLV converter, centered at Bern, Ch.

Arguments:
  • latlonh0 - The geodetic origin and height, overriding Bern, Ch.
  • other_Ltp_kwds - Optional, other Ltp.__init__ keyword arguments.
Raises:
  • TypeError - Invalid ecef.
Overrides: object.__init__

See Also: Ltp.__init__ for more information.

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

 

Convert WGS84 geodetic to Swiss projection coordinates. Must be overloaded.

Arguments:
  • latlonh - Either a LatLon, Ltp or scalar (geodetic) latitude (degrees).
  • lon - Optional, scalar (geodetic) longitude for scalar latlonh (degrees).
  • height - Optional, height, vertically above (or below) the surface of the ellipsoid (meter) for scalar latlonh and lon.
  • M - If True, return the concatenated rotation EcefMatrix iff available 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, this ChLV* instance and ecef (Ecef9Tuple) at Bern, Ch and rotation matrix M. The returned ltp is this ChLV, ChLVa or ChLVe instance.
Raises:
  • LocalError - Invalid or non-scalar latlonh, lon or height.
Overrides: LocalCartesian.forward
(inherited documentation)

reverse (self, enh_, n=None, h_=0, M=None, **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_LV85 or x_LV03 northing for scalar enh_ and h_ (meter).
  • h_ - Swiss h' height for scalar enh_ and n (meter).
  • M - If True, return the concatenated rotation EcefMatrix iff available 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, this ChLV* instance and ecef (Ecef9Tuple) at Bern, Ch and rotation matrix M. The returned ltp is this ChLV, ChLVa or ChLVe instance.
Raises:
  • LocalError - Invalid or non-scalar enh_, n or h_.
Overrides: LocalCartesian.reverse
(inherited documentation)

false2 (Y, X, LV95=True, **name)
Static Method

 

Add the Swiss LV95 or LV03 falsing.

Arguments:
  • Y - Unfalsed Swiss Y easting (meter).
  • X - Unfalsed Swiss X northing (meter).
  • LV95 - If True, add LV95 falsing, if False add LV03 falsing, otherwise leave unfalsed.
  • name - Optional name=NN (str).
Returns:
A ChLVEN2Tuple(E_LV95, N_LV95) or a ChLVyx2Tuple(y_LV03, x_LV03) with falsed Y and X, otherwise a ChLVYX2Tuple(Y, X) with Y and X as-is.

isLV03 (e, n)
Static Method

 

Is (e, n) a valid Swiss LV03 projection?

Arguments:
  • e - Falsed (or unfalsed) Swiss easting (meter).
  • n - Falsed (or unfalsed) Swiss northing (meter).
Returns:
True if (e, n) is a valid, falsed Swiss LV03, projection False otherwise.

isLV95 (e, n, raiser=True)
Static Method

 

Is (e, n) a valid Swiss LV95 or LV03 projection?

Arguments:
  • e - Falsed (or unfalsed) Swiss easting (meter).
  • n - Falsed (or unfalsed) Swiss northing (meter).
  • raiser - If True, throw a LocalError if e and n are invalid Swiss LV95 nor LV03.
Returns:
True or False if (e, n) is a valid Swiss LV95 respectively LV03 projection, None otherwise.

unfalse2 (e, n, LV95=None, **name)
Static Method

 

Remove the Swiss LV95 or LV03 falsing.

Arguments:
  • e - Falsed Swiss E_LV95 or y_LV03 easting (meter).
  • n - Falsed Swiss N_LV95 or x_LV03 northing (meter).
  • LV95 - If True, remove LV95 falsing, if False remove LV03 falsing, otherwise use method isLV95(e, n).
  • name - Optional name=NN (str).
Returns:
A ChLVYX2Tuple(Y, X) with the unfalsed e respectively n.

Class Variable Details

Bern

Value:
Bern(lat=46.952406, lon=7.439583, height=49.55, datum=Datum(name='WGS8\
4', ellipsoid=Ellipsoids.WGS84, transform=Transforms.WGS84))

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