def distance2To(self, other, radius=R_M, adjust=False, wrap=False):
'''Compute the distance between this and an other geohash
using the U{Equirectangular Approximation / Projection
<https://www.Movable-Type.co.UK/scripts/latlong.html>}.
@arg other: The other geohash (L{Geohash}).
@kwarg radius: Mean earth radius (C{meter}) or C{None}.
@kwarg adjust: Adjust the wrapped, unrolled longitudinal
delta by the cosine of the mean latitude
C{bool}).
@kwarg wrap: Wrap and unroll longitudes (C{bool}).
@return: Approximate distance (C{meter}, same units as I{radius})
or distance squared (C{degrees} squared) if I{radius}
is C{None} or 0.
@raise TypeError: The I{other} is not a L{Geohash}, C{LatLon}
or C{str}.
@see: U{Local, flat earth approximation
<https://www.EdWilliams.org/avform.htm#flat>}, functions
'''
other = _2Geohash(other)
a1, b1 = self.latlon
a2, b2 = other.latlon
if radius:
return equirectangular(a1, b1, a2, b2, radius=radius,
adjust=adjust, limit=None, wrap=wrap)
else:
return equirectangular_(a1, b1, a2, b2,
adjust=adjust, limit=None, wrap=wrap)[0]
def equirectangular3(lat1, lon1, lat2, lon2, **options):
'''DEPRECATED, use function C{equirectangular_}.
@return: 3-Tuple C{(distance2, delta_lat, delta_lon)}.
'''
from pygeodesy.formy import equirectangular_
return tuple(equirectangular_(lat1, lon1, lat2, lon2, **options)[:3])
def d2yxu(self, i, j):
'''Return distance squared, points[i] to -[j] deltas and
longitudinal unrollment.
'''
p1 = self.pts[i]
p2 = self.pts[j]
return equirectangular_(p1.lat, p1.lon, p2.lat, p2.lon, **self.options)
