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initial commit after bringing over cleaned up code and testing some examples

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Blake J. Harnden 2017-04-25 08:45:34 -07:00
parent c4858e6e0d
commit 00f4ebf5a9
93 changed files with 15189 additions and 13083 deletions
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28
daemon/core/misc/utm.py
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@ -66,6 +66,7 @@ import math
__all__ = ['to_latlon', 'from_latlon']
class OutOfRangeError(ValueError):
pass
@ -139,7 +140,7 @@ def to_latlon(easting, northing, zone_number, zone_letter):
n = R / ep_sin_sqrt
r = (1 - E) / ep_sin
c = _E * p_cos**2
c = _E * p_cos ** 2
c2 = c * c
d = x / (n * K0)
@ -152,7 +153,7 @@ def to_latlon(easting, northing, zone_number, zone_letter):
latitude = (p_rad - (p_tan / r) *
(d2 / 2 -
d4 / 24 * (5 + 3 * p_tan2 + 10 * c - 4 * c2 - 9 * E_P2)) +
d6 / 720 * (61 + 90 * p_tan2 + 298 * c + 45 * p_tan4 - 252 * E_P2 - 3 * c2))
d6 / 720 * (61 + 90 * p_tan2 + 298 * c + 45 * p_tan4 - 252 * E_P2 - 3 * c2))
longitude = (d -
d3 / 6 * (1 + 2 * p_tan2 + c) +
@ -184,8 +185,8 @@ def from_latlon(latitude, longitude):
zone_letter = latitude_to_zone_letter(latitude)
n = R / math.sqrt(1 - E * lat_sin**2)
c = E_P2 * lat_cos**2
n = R / math.sqrt(1 - E * lat_sin ** 2)
c = E_P2 * lat_cos ** 2
a = lat_cos * (lon_rad - central_lon_rad)
a2 = a * a
@ -204,7 +205,7 @@ def from_latlon(latitude, longitude):
a5 / 120 * (5 - 18 * lat_tan2 + lat_tan4 + 72 * c - 58 * E_P2)) + 500000
northing = K0 * (m + n * lat_tan * (a2 / 2 +
a4 / 24 * (5 - lat_tan2 + 9 * c + 4 * c**2) +
a4 / 24 * (5 - lat_tan2 + 9 * c + 4 * c ** 2) +
a6 / 720 * (61 - 58 * lat_tan2 + lat_tan4 + 600 * c - 330 * E_P2)))
if latitude < 0:
@ -244,16 +245,15 @@ def zone_number_to_central_longitude(zone_number):
def haversine(lon1, lat1, lon2, lat2):
"""
Calculate the great circle distance between two points
Calculate the great circle distance between two points
on the earth (specified in decimal degrees)
"""
# convert decimal degrees to radians
# convert decimal degrees to radians
lon1, lat1, lon2, lat2 = map(math.radians, [lon1, lat1, lon2, lat2])
# haversine formula
dlon = lon2 - lon1
dlat = lat2 - lat1
a = math.sin(dlat/2)**2 + math.cos(lat1) * math.cos(lat2) * math.sin(dlon/2)**2
c = 2 * math.asin(math.sqrt(a))
# haversine formula
dlon = lon2 - lon1
dlat = lat2 - lat1
a = math.sin(dlat / 2) ** 2 + math.cos(lat1) * math.cos(lat2) * math.sin(dlon / 2) ** 2
c = 2 * math.asin(math.sqrt(a))
m = 6367000 * c
return m
return m