Package pygeodesy :: Module nvectorBase |
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# Module nvectorBase

(INTERNAL) Base classes LatLonNvectorBase and NvectorBase and function sumOf for `N-vectorial` ellipsoidal and spherical `Cartesian`s and `LatLon`s.

Pure Python implementation of `n-vector`-based geodesy tools for ellipsoidal earth models, transcribed from JavaScript originals by (C) Chris Veness 2005-2016 and published under the same MIT Licence**, see Vector-based geodesy.

Version: 20.03.15

Classes
| NvectorBase Base class for ellipsoidal and spherical `Nvector`s.
| LatLonNvectorBase (INTERNAL) Base class for n-vector-based ellipsoidal and spherical `LatLon` classes.

Functions
sumOf(nvectors, Vector=None, h=None, **kwds) Return the vectorial sum of two or more n-vectors. |

Variables
| NorthPole = `NvectorBase(0.0, 0.0, 1.0)` North pole (`Nvector`).
| SouthPole = `NvectorBase(0.0, 0.0, -1.0)` South pole (`Nvector`).

Function Details

### sumOf(nvectors, Vector=None, h=None, **kwds) |
Return the vectorial sum of two or more n-vectors. Parameters: `nvectors` - Vectors to be added (`Nvector`[]). `Vector` - Optional class for the vectorial sum (`Nvector`) or `None`. `h` - Optional height, overriding the mean height (`meter`). `kwds` - Optional, additional `Vector` keyword arguments, ignored if `Vector=None`. Returns: Vectorial sum (`Vector`) or a Vector4Tuple`(x, y, z, h)` if `Vector=None`. Raises: `VectorError` - No `nvectors`.