Package pygeodesy :: Module sphericalNvector :: Class Nvector

Class Nvector

       object --+                    
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     named._Named --+                
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     named._NamedBase --+            
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vector3dBase.Vector3dBase --+        
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            vector3d.Vector3d --+    
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          nvectorBase.NvectorBase --+
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                                   Nvector

An n-vector is a position representation using a (unit) vector normal to the earth's surface. 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.

On a spherical model earth, an n-vector is equivalent to an earth-centred earth-fixed (ECEF) vector.

Note commonality with pygeodesy.ellipsoidalNvector.Nvector.

Instance Methods

toCartesian(self, **Cartesian_and_kwds)
Convert this n-vector to Nvector-based cartesian (ECEF) coordinates.

toLatLon(self, **LatLon_and_kwds)
Convert this n-vector to an Nvector-based geodetic point.

greatCircle(self, bearing)
Compute the n-vector normal to great circle obtained by heading on given compass bearing from this point as its n-vector.

Inherited from nvectorBase.NvectorBase: __init__, hStr, to2ab, to2ll, to3abh, to3llh, to4xyzh, toStr, toVector3d, unit

Inherited from vector3d.Vector3d: bearing, circin6, circum3, circum4_, iscolinearWith, meeus2, nearestOn, nearestOn6, parse, radii11, soddy4, trilaterate2d2, trilaterate3d2

Inherited from vector3dBase.Vector3dBase: __abs__, __add__, __bool__, __ceil__, __cmp__, __div__, __divmod__, __eq__, __float__, __floor__, __floordiv__, __format__, __ge__, __gt__, __hash__, __iadd__, __idiv__, __ifloordiv__, __imatmul__, __imod__, __imul__, __int__, __ipow__, __isub__, __itruediv__, __le__, __long__, __lt__, __matmul__, __mod__, __mul__, __ne__, __neg__, __nonzero__, __pos__, __pow__, __radd__, __rdiv__, __rdivmod__, __rfloordiv__, __rmatmul__, __rmod__, __rmul__, __round__, __rpow__, __rsub__, __rtruediv__, __sub__, __truediv__, __trunc__, angleTo, apply, bools, cmp, cross, dividedBy, dot, equals, equirectangular, fabs, floats, intermediateTo, ints, isconjugateTo, isequalTo, minus, minus_, negate, others, plus, plus_, rotate, rotateAround, sum, times, times_, to3xyz

Inherited from named._NamedBase: __repr__, __str__, toRepr

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

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

Properties

sphericalNvector

Inherited from nvectorBase.NvectorBase: Ecef, H, datum, ellipsoidalNvector, h, isEllipsoidal, isSpherical, lam, lat, latlon, latlonheight, latlonheightdatum, lon, phi, philam, philamheight, philamheightdatum, xyzh

Inherited from vector3dBase.Vector3dBase: crosserrors, euclid, homogeneous, length, length2, x, x2y2z2, xyz, xyz3, y, z

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

Inherited from object: __class__

Method Details

toCartesian (self, **Cartesian_and_kwds)

Convert this n-vector to Nvector-based cartesian (ECEF) coordinates.

Arguments:

Cartesian_and_kwds - Optional Cartesian and Cartesian keyword arguments, like h. Use Cartesian=... to override this Cartesian class or specify Cartesian=None.

Returns:

The cartesian point (Cartesian) or if Cartesian is set to None, an Ecef9Tuple

(x, y, z, lat, lon, height, C, 
          M, datum)

with C and M if available.

Raises:

TypeError - Invalid Cartesian_and_kwds argument.

Overrides: nvectorBase.NvectorBase.toCartesian

toLatLon (self, **LatLon_and_kwds)

Convert this n-vector to an Nvector-based geodetic point.

Arguments:

LatLon_and_kwds - Optional LatLon and LatLon keyword arguments, like height. Use LatLon=... to override this LatLon class or specify LatLon=None.

Returns:

The geodetic point (LatLon) or if LatLon is set to None, an Ecef9Tuple

(x, y, z, lat, lon, height, C, 
          M, datum)

with C and M if available.

Raises:

TypeError - Invalid LatLon_and_kwds argument.
ValueError - Invalid height.

Overrides: nvectorBase.NvectorBase.toLatLon

greatCircle (self, bearing)

Compute the n-vector normal to great circle obtained by heading on given compass bearing from this point as its n-vector.

Direction of vector is such that initial bearing vector b = c × p.

Arguments:

bearing - Initial compass bearing (degrees).

Returns:

N-vector representing great circle (Nvector).

Raises:

Valuerror - Polar coincidence.

Property Details

sphericalNvector

Get method:: sphericalNvector(self) - Get this Nvector's spherical class.
Set method:: _fset_error(inst, val) - Throws an AttributeError, always.
Delete Method:: _fdel(inst) - Zap the cached/memoized property value.