Package pygeodesy :: Module frechet :: Class FrechetKarney |
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# Class FrechetKarney

      object --+
               |
    named._Named --+
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             Frechet --+
                       |
          FrechetDegrees --+
                           |
                          FrechetKarney

Compute the `Frechet` distance based on the angular distance in `degrees` from Karney's geographiclib Geodesic Inverse method.

See Also: FrechetCosineAndoyerLambert, FrechetCosineForsytheAndoyerLambert, FrechetDistanceTo, FrechetFlatLocal, FrechetHubeny and FrechetThomas.

Instance Methods
__init__(self, points, datum=None, wrap=False, fraction=None, name=`'````'`) New FrechetKarney calculator/interpolator. |
discrete(self, points, fraction=None) Compute the `forward, discrete Fréchet` distance. |
distance(self, p1, p2) Return the non-negative angular distance in `degrees`. |
Inherited from `Frechet`: `point`, `points_`, `points_fraction` Inherited from `named._Named`: `__repr__`, `__str__`, `_dot_`, `attrs`, `classof`, `copy`, `toRepr`, `toStr`, `toStr2` Inherited from `object`: `__delattr__`, `__format__`, `__getattribute__`, `__hash__`, `__new__`, `__reduce__`, `__reduce_ex__`, `__setattr__`, `__sizeof__`, `__subclasshook__`

Properties
Inherited from `Frechet`: `adjust`, `datum`, `fraction`, `units`, `wrap` Inherited from `named._Named`: `classname`, `classnaming`, `name`, `named`, `named2` Inherited from `object`: `__class__`

Method Details

### __init__ (self, points, datum=None, wrap=False, fraction=None, name=`'````'`) (Constructor) |
New FrechetKarney calculator/interpolator. Arguments: `points` - First set of points (`LatLon`[], Numpy2LatLon[], Tuple2LatLon[] or `other`[]). `datum` - Optional datum overriding the default `Datums.WGS84` and first `points`' datum (Datum). `wrap` - Wrap and unroll180 longitudes (`bool`) `fraction` - Index fraction (`float` in EPS..EPS1) to interpolate intermediate `points` or use `None`, `0` or `1` for no intermediate `points` and no fractional indices. `name` - Optional calculator/interpolator name (`str`). Raises: `FrechetError` - Insufficient number of `points` or invalid `fraction`. `ImportError` - Package geographiclib missing. `TypeError` - Invalid `datum`. Overrides: object.__init__

### discrete (self, points, fraction=None) |
Compute the `forward, discrete Fréchet` distance. Arguments: `points` - Second set of points (`LatLon`[], Numpy2LatLon[], Tuple2LatLon[] or `other`[]). `fraction` - Index fraction (`float` in EPS..EPS1) to interpolate intermediate `points` or use `None`, `0` or `1` for no intermediate `points` and no fractional indices. Returns: A Frechet6Tuple`(fd, fi1, fi2, r, n, units)`. Raises: `FrechetError` - Insufficient number of `points` or an invalid `point` or `fraction`. `RecursionError` - Recursion depth exceeded, see sys.getrecursionlimit(). Overrides: Frechet.discrete

### distance (self, p1, p2) |
Return the non-negative angular distance in `degrees`. Overrides: Frechet.distance