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pygeodesy
Package pygeodesy :: Module sphericalBase :: Class LatLonSphericalBase
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Class LatLonSphericalBase

   object --+            
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 named._Named --+        
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 named._NamedBase --+    
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       object --+   |    
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named._NamedLocal --+    
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latlonBase.LatLonBase --+
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                       LatLonSphericalBase
Known Subclasses:

(INTERNAL) Base class for spherical LatLons.

Instance Methods
 
__init__(self, latlonh, lon=None, height=0, datum=None, wrap=False, **name)
Create a spherical LatLon point frome the given lat-, longitude and height on the given datum.
 
bearingTo2(self, other, wrap=False, raiser=False)
Return the initial and final bearing (forward and reverse azimuth) from this to an other point.
 
finalBearingTo(self, other, wrap=False, raiser=False)
Return the final bearing (reverse azimuth) from this to an other point.
 
intersecant2(self, circle, point, other, radius=6371008.771415, exact=False, height=None, wrap=False)
Compute the intersections of a circle and a (great circle) line given as two points or as a point and bearing.
 
maxLat(self, bearing)
Return the maximum latitude reached when travelling on a great circle on given bearing from this point based on Clairaut's formula.
 
minLat(self, bearing)
Return the minimum latitude reached when travelling on a great circle on given bearing from this point.
 
parse(self, strllh, height=0, sep=',', **name)
Parse a string representing a similar, spherical LatLon point, consisting of "lat, lon[, height]".
 
rhumbAzimuthTo(self, other, radius=6371008.771415, exact=False, wrap=False, b360=False)
Return the azimuth (bearing) of a rhumb line (loxodrome) between this and an other (spherical) point.
 
rhumbBearingTo(self, other)
DEPRECATED, use method .rhumbAzimuthTo.
 
rhumbDestination(self, distance, azimuth, radius=6371008.771415, height=None, exact=False, **name)
Return the destination point having travelled the given distance from this point along a rhumb line (loxodrome) of the given azimuth.
 
rhumbDistanceTo(self, other, radius=6371008.771415, exact=False, wrap=False)
Return the distance from this to an other point along a rhumb line (loxodrome).
 
rhumbIntersecant2(self, circle, point, other, radius=6371008.771415, exact=True, height=None, wrap=False)
Compute the intersections of a circle and a rhumb line given as two points and as a point and azimuth.
 
rhumbMidpointTo(self, other, height=None, radius=6371008.771415, exact=False, fraction=0.5, **wrap_name)
Return the (loxodromic) midpoint on the rhumb line between this and an other point.
 
toNvector(self, Nvector=<class 'pygeodesy.nvectorBase.NvectorBase'>, **Nvector_kwds)
Convert this point to Nvector components, including height.

Inherited from latlonBase.LatLonBase: PointsIter, __eq__, __ne__, __str__, antipode, bounds, boundsOf, chordTo, circin6, circum3, circum4_, compassAngle, compassAngleTo, cosineAndoyerLambertTo, cosineForsytheAndoyerLambertTo, cosineLawTo, destinationXyz, equals, equals3, equirectangularTo, euclideanTo, flatLocalTo, flatPolarTo, hartzell, haversineTo, height4, heightStr, hubenyTo, isantipode, isantipodeTo, isequalTo, isequalTo3, latlon2, latlon2round, latlon_, nearestOn6, nearestTo, normal, philam2, points, points2, radii11, rhumbLine, thomasTo, to2ab, to3llh, to3xyz, toCartesian, toDatum, toEcef, toNormal, toStr, toVector, toVector3d, toWm, vincentysTo

Inherited from named._NamedBase: __repr__, others, toRepr

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

Inherited from named._NamedLocal: toAer, toEnu, toLocal, toLtp, toNed, toXyz

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

Properties
  datum
Class property with a .name attribute.
  napieradius
Class property with a .name attribute.
  sphericalLatLon
Get this LatLon's spherical class.

Inherited from latlonBase.LatLonBase: clipid, ellipsoidalLatLon, height, isEllipsoidal, isSpherical, isnormal, lam, lat, latlon, latlonheight, lon, phi, philam, philamheight, xyz, xyz3, xyzh

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

Inherited from named._NamedLocal: Ecef

Inherited from object: __class__

Method Details

__init__ (self, latlonh, lon=None, height=0, datum=None, wrap=False, **name)
(Constructor)

 

Create a spherical LatLon point frome the given lat-, longitude and height on the given datum.

Arguments:
  • latlonh - Latitude (degrees or DMS str with N or S suffix) or a previous LatLon instance provided lon=None.
  • lon - Longitude (degrees or DMS str with E or W suffix) or C(None), indicating latlonh is a LatLon.
  • height - Optional height above (or below) the earth surface (meter, same units as the datum's radius or axes).
  • datum - Optional, spherical datum to use (Datum, Ellipsoid, Ellipsoid2, a_f2Tuple) or the mean earth radius (meter, conventionally).
  • wrap - If True, wrap or normalize lat and lon (bool).
  • name - Optional name=NN (str).
Returns:
New instance (LatLon).
Raises:
  • TypeError - Invalid latlonh or datum not spherical.
Overrides: object.__init__

bearingTo2 (self, other, wrap=False, raiser=False)

 

Return the initial and final bearing (forward and reverse azimuth) from this to an other point.

Arguments:
  • other - The other point (LatLon).
  • wrap - If True, wrap or normalize and unroll the other point (bool).
Returns:
A Bearing2Tuple(initial, final).
Raises:
  • TypeError - The other point is not spherical.

See Also: Methods initialBearingTo and finalBearingTo.

finalBearingTo (self, other, wrap=False, raiser=False)

 

Return the final bearing (reverse azimuth) from this to an other point.

Arguments:
  • other - The other point (spherical LatLon).
  • wrap - If True, wrap or normalize and unroll the other point (bool).
Returns:
Final bearing (compass degrees360).
Raises:
  • TypeError - The other point is not spherical.

intersecant2 (self, circle, point, other, radius=6371008.771415, exact=False, height=None, wrap=False)

 

Compute the intersections of a circle and a (great circle) line given as two points or as a point and bearing.

Arguments:
  • circle - Radius of the circle centered at this location (meter, same units as radius) or a point on the circle (same LatLon class).
  • point - A point on the (great circle) line (same LatLon class).
  • other - An other point on (same LatLon class) or the bearing at point of the (great circle) line (compass degrees).
  • radius - Mean earth radius (meter, conventionally).
  • exact - If True, use the exact rhumb methods for azimuth, destination and distance, if False use the basic rhumb methods (bool) or if None use the great circle methods.
  • height - Optional height for the intersection points (meter, conventionally) or None for interpolated heights.
  • wrap - If True, wrap or normalize and unroll circle, point and other iff points (bool).
Returns:
2-Tuple of the intersection points (representing a chord), each an instance of the point class. Both points are the same instance if the (great circle) line is tangent to the circle.
Raises:
  • IntersectionError - The circle and line do not intersect.
  • TypeError - Invalid point, circle or other.
  • UnitError - Invalid circle, other, radius, exact, height or napieradius.
Overrides: latlonBase.LatLonBase.intersecant2

maxLat (self, bearing)

 

Return the maximum latitude reached when travelling on a great circle on given bearing from this point based on Clairaut's formula.

The maximum latitude is independent of longitude and the same for all points on a given latitude.

Negate the result for the minimum latitude (on the Southern hemisphere).

Arguments:
  • bearing - Initial bearing (compass degrees360).
Returns:
Maximum latitude (degrees90).
Raises:
  • ValueError - Invalid bearing.

minLat (self, bearing)

 

Return the minimum latitude reached when travelling on a great circle on given bearing from this point.

Arguments:
  • bearing - Initial bearing (compass degrees360).
Returns:
Minimum latitude (degrees90).
Raises:
  • ValueError - Invalid bearing.

See Also: Method maxLat for more details.

parse (self, strllh, height=0, sep=',', **name)

 

Parse a string representing a similar, spherical LatLon point, consisting of "lat, lon[, height]".

Arguments:
  • strllh - Lat, lon and optional height (str), see function pygeodesy.parse3llh.
  • height - Optional, default height (meter).
  • sep - Optional separator (str).
  • name - Optional name=NN (str), overriding this name.
Returns:
The similar point (spherical LatLon).
Raises:

rhumbAzimuthTo (self, other, radius=6371008.771415, exact=False, wrap=False, b360=False)

 

Return the azimuth (bearing) of a rhumb line (loxodrome) between this and an other (spherical) point.

Arguments:
  • other - The other point (spherical LatLon).
  • radius - Earth radius (meter) or earth model (Datum, Ellipsoid, Ellipsoid2 or a_f2Tuple).
  • exact - If True, use Elliptic, Krüger Rhumb (bool), default False for backward compatibility.
  • wrap - If True, wrap or normalize and unroll the other point (bool).
  • b360 - If True, return the azimuth in the bearing range.
Returns:
Rhumb azimuth (compass degrees180 or degrees360).
Raises:
  • TypeError - The other point is incompatible or radius is invalid.
Overrides: latlonBase.LatLonBase.rhumbAzimuthTo

rhumbBearingTo (self, other)

 

DEPRECATED, use method .rhumbAzimuthTo.

Decorators:
  • @deprecated_method

rhumbDestination (self, distance, azimuth, radius=6371008.771415, height=None, exact=False, **name)

 

Return the destination point having travelled the given distance from this point along a rhumb line (loxodrome) of the given azimuth.

Arguments:
  • distance - Distance travelled (meter, same units as radius), may be negative if exact=True.
  • azimuth - Azimuth (bearing) of the rhumb line (compass degrees).
  • radius - Earth radius (meter) or earth model (Datum, Ellipsoid, Ellipsoid2 or a_f2Tuple) if exact=True.
  • height - Optional height, overriding the default height (meter.
  • exact - If True, use Elliptic, Krüger Rhumb (bool), default False for backward compatibility.
  • name - Optional name=NN (str).
Returns:
The destination point (spherical LatLon).
Raises:
  • ValueError - Invalid distance, azimuth, radius or height.
Overrides: latlonBase.LatLonBase.rhumbDestination

rhumbDistanceTo (self, other, radius=6371008.771415, exact=False, wrap=False)

 

Return the distance from this to an other point along a rhumb line (loxodrome).

Arguments:
  • other - The other point (spherical LatLon).
  • radius - Earth radius (meter) or earth model (Datum, Ellipsoid, Ellipsoid2 or a_f2Tuple) if exact=True.
  • exact - If True, use Elliptic, Krüger Rhumb (bool), default False for backward compatibility.
  • wrap - If True, wrap or normalize and unroll the other point (bool).
Returns:
Distance (meter, the same units as radius or radians if radius is None).
Raises:
  • TypeError - The other point is incompatible.
  • ValueError - Invalid radius.
Overrides: latlonBase.LatLonBase.rhumbDistanceTo

rhumbIntersecant2 (self, circle, point, other, radius=6371008.771415, exact=True, height=None, wrap=False)

 

Compute the intersections of a circle and a rhumb line given as two points and as a point and azimuth.

Arguments:
  • circle - Radius of the circle centered at this location (meter, same units as radius) or a point on the circle (same LatLon class).
  • point - The rhumb line's start point (same LatLon class).
  • other - An other point (this on LatLon) or the azimuth of (compass degrees) the rhumb line.
  • radius - Mean earth radius (meter, conventionally).
  • exact - If True, use the exact rhumb methods for azimuth, destination and distance, if False use the basic rhumb methods (bool) or if None use the great circle methods.
  • height - Optional height for the intersection points (meter, conventionally) or None.
  • wrap - If True, wrap or normalize and unroll the points circle, point and/or other (bool).
Returns:
2-Tuple of the intersection points (representing a chord), each an instance of this class. For a tangent line, both points are the same instance, wrapped or normalized.
Raises:
  • IntersectionError - The circle and line do not intersect.
  • TypeError - Invalid point, circle or other.
  • UnitError - Invalid circle, other, radius, exact or height.
Overrides: latlonBase.LatLonBase.rhumbIntersecant2

rhumbMidpointTo (self, other, height=None, radius=6371008.771415, exact=False, fraction=0.5, **wrap_name)

 

Return the (loxodromic) midpoint on the rhumb line between this and an other point.

Arguments:
  • other - The other point (spherical LatLon).
  • height - Optional height, overriding the mean height (meter).
  • radius - Earth radius (meter) or earth model (Datum, Ellipsoid, Ellipsoid2 or a_f2Tuple).
  • exact - If True, use Elliptic, Krüger Rhumb (bool), default False for backward compatibility.
  • fraction - Midpoint location from this point (scalar), may be negative if exact=True.
  • wrap_name - Optional name=NN (str) and optional keyword argument wrap=False, if True, wrap or normalize and unroll the other point (bool).
Returns:
The (mid)point at the given fraction along the rhumb line (spherical LatLon).
Raises:
  • TypeError - The other point is incompatible.
  • ValueError - Invalid height or fraction
Overrides: latlonBase.LatLonBase.rhumbMidpointTo

toNvector (self, Nvector=<class 'pygeodesy.nvectorBase.NvectorBase'>, **Nvector_kwds)

 

Convert this point to Nvector components, including height.

Arguments:
  • Nvector_kwds - Optional, additional Nvector keyword arguments, ignored if Nvector is None.
Returns:
An Nvector or a Vector4Tuple(x, y, z, h) if Nvector is None.
Raises:
  • TypeError - Invalid Nvector or Nvector_kwds.
Overrides: latlonBase.LatLonBase.toNvector

Property Details

datum

Class property with a .name attribute.

Get method:
datum(self) - Get this point's datum (Datum).
Set method:
datum(self, datum) - Set this point's datum without conversion (Datum, Ellipsoid, Ellipsoid2, a_f2Tuple) or scalar spherical earth radius).

napieradius

Class property with a .name attribute.

Get method:
napieradius(self) - Get the Napier radius (meter, conventionally).
Set method:
napieradius(self, radius) - Set this Napier radius (meter, conventionally) or 0.

sphericalLatLon

Get this LatLon's spherical class.

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

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