Package pygeodesy :: Module ellipsoidalNvector :: Class Nvector |
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# Class Nvector

      object --+
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    bases._Named --+
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        bases._Based --+
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      bases._VectorBased --+
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           vector3d.Vector3d --+
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                 nvector.Nvector --+
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                                  Nvector

An n-vector is a position representation using a (unit) vector normal to the earth ellipsoid. Unlike lat-/longitude points, n-vectors have no singularities or discontinuities.

For many applications, n-vectors are more convenient to work with than other position representations like lat-/longitude, earth-centred earth-fixed (ECEF) vectors, UTM coordinates, etc.

Note commonality with sphericalNvector.Nvector.

Instance Methods
__init__(self, x, y, z, h=0, datum=None, ll=None, name=`'````'`) New n-vector normal to the earth's surface. |
copy(self) Copy this vector. |
toLatLon(self, height=None, LatLon=<class 'pygeodesy.ellipsoidalNvector.LatLon'>) Convert this n-vector to an (ellipsoidal) geodetic point. |
toCartesian(self, Cartesian=<class 'pygeodesy.ellipsoidalNvector.Cartesian'>) Convert this n-vector to a cartesian point. |
unit(self, ll=None) Normalize this vector to unit length. |
Inherited from `nvector.Nvector`: `to3abh`, `to3llh`, `to4xyzh`, `toStr`, `toVector3d` Inherited from `vector3d.Vector3d`: `__abs__`, `__add__`, `__cmp__`, `__div__`, `__eq__`, `__ge__`, `__gt__`, `__iadd__`, `__imatmul__`, `__imul__`, `__isub__`, `__itruediv__`, `__le__`, `__lt__`, `__matmul__`, `__mul__`, `__ne__`, `__neg__`, `__pos__`, `__radd__`, `__rmatmul__`, `__rmul__`, `__rsub__`, `__sub__`, `__truediv__`, `angleTo`, `cross`, `dividedBy`, `dot`, `equals`, `isequalTo`, `minus`, `negate`, `others`, `parse`, `plus`, `rotate`, `rotateAround`, `sum`, `times`, `to2ab`, `to2ll`, `to3xyz` Inherited from `bases._Based`: `__repr__`, `__str__`, `classof`, `toStr2` Inherited from `object`: `__delattr__`, `__format__`, `__getattribute__`, `__hash__`, `__new__`, `__reduce__`, `__reduce_ex__`, `__setattr__`, `__sizeof__`, `__subclasshook__`

Class Variables
Inherited from `nvector.Nvector`: `H`

Properties
| datum Get this n-vector's datum (Datum).
Inherited from `nvector.Nvector`: `h` Inherited from `vector3d.Vector3d`: `crosserrors`, `length`, `x`, `y`, `z` Inherited from `bases._Named`: `classname`, `classnaming`, `name` Inherited from `object`: `__class__`

Method Details

### __init__(self, x, y, z, h=0, datum=None, ll=None, name=`'````'`) (Constructor) |
New n-vector normal to the earth's surface. Parameters: `x` - X component (`meter`). `y` - Y component (`meter`). `z` - Z component (`meter`). `h` - Optional height above model surface (`meter`). `datum` - Optional datum this n-vector is defined within (Datum). `ll` - Optional, original latlon (LatLon). `name` - Optional name (`str`). Raises: `TypeError` - If datum is not a Datum. Overrides: object.__init__ Example:
    >>> from ellipsoidalNvector import Nvector
    >>> v = Nvector(0.5, 0.5, 0.7071, 1)
    >>> v.toLatLon()  # 45.0°N, 045.0°E, +1.00m

### copy(self) |
Copy this vector. Returns: Copy (Nvector). Overrides: bases._Named.copy

### toLatLon(self, height=None, LatLon=<class 'pygeodesy.ellipsoidalNvector.LatLon'>) |
Convert this n-vector to an (ellipsoidal) geodetic point. Parameters: `height` - Optional height, overriding the default height (`meter`). `LatLon` - Optional ellipsoidal (sub-)class to use for the point (LatLon) or `None`. Returns: Point equivalent to this n-vector (LatLon) or 3-tuple (`degrees90`, `degrees180`, height) if LatLon is `None`. Example:
    >>> v = Nvector(0.5, 0.5, 0.7071)
    >>> p = v.toLatLon()  # 45.0°N, 45.0°E

### toCartesian(self, Cartesian=<class 'pygeodesy.ellipsoidalNvector.Cartesian'>) |
Convert this n-vector to a cartesian point. Parameters: `Cartesian` - Optional, cartesion (sub-)class to use for the point (Cartesian). Returns: Cartesian equivalent to this n-vector (Cartesian). Example:
    >>> v = Nvector(0.5, 0.5, 0.7071)
    >>> c = v.toCartesian()  # [3194434, 3194434, 4487327]
    >>> p = c.toLatLon()  # 45.0°N, 45.0°E

### unit(self, ll=None) |
Normalize this vector to unit length. Parameters: `ll` - Optional, original latlon (`LatLon`). Returns: Normalised vector (Nvector). Overrides: vector3d.Vector3d.unit

Property Details

### datum Get this n-vector's datum (Datum). Get Method: datum(self) - Get this n-vector's datum (Datum). Set Method: Read_Only(self, ignored) - Throws an `AttributeError`, always.