Class Tuple2LatLon

Handle a list of tuples, each containing a lat- and longitude and perhaps other values as a sequence of LatLon points.

Arguments:

• tuples - The list, tuple or sequence of tuples (tuple[]).
• ilat - Optional index of the latitudes value (int).
• ilon - Optional index of the longitudes value (int).
• LatLon - Optional LatLon class to use (LatLon_).

Raises:

• IndexError - If (len(tuples), min(len(t) for t in tuples)) is not (1+, 2+).
• TypeError - If tuples is not a list, tuple or sequence or if LatLon is not a LatLon with lat, lon and name attributes.
• ValueError - If the ilat and/or ilon values are the same or out of range.

Overrides: object.__init__

>>> tuples = [(0, 1), (2, 3), (4, 5)]
>>> type(tuples)
<type 'list'>  # <class ...> in Python 3+
>>> points = Tuple2LatLon(tuples, lat=0, lon=1)
>>> simply = simplifyRW(points, 0.5, ...)
>>> type(simply)
<type 'list'>  # <class ...> in Python 3+
>>> simply
[(0, 1), (4, 5)]
>>> sliced = points[1:-1]
>>> type(sliced)
<class '...Tuple2LatLon'>
>>> sliced
...Tuple2LatLon([(2, 3), ...][1], ilat=0, ilon=1)

>>> closest, _ = nearestOn2(LatLon_(2, 1), points, adjust=False)
>>> closest
LatLon_(lat=1.0, lon=2.0)

>>> closest, _ = nearestOn2(LatLon_(3, 2), points)
>>> closest
LatLon_(lat=2.001162, lon=3.001162)

isTuple2

Is this a Tuple2 wrapper?

Get method:

isTuple2(self) - Is this a Tuple2 wrapper?

Set method:

_fset_error(inst, val) - Throws an AttributeError, always.

Delete Method:

_fdel(inst) - Zap the cached/memoized property value.