PYTHON 2/3 SPHERICAL TRIGONOMETRY FUNCTIONS PACKAGE

based on original spherical trigonometry scripts pack

USAGE

Import package to your script:

import python_spheric as s

Set units

s.set_units('nm') #or 'km'(by default). Otherwise no changes been taken

Direct issue solution

is the "direct" geodesic issue, solve the coordinates of second point by given coordinates of first point, distance and azimuth

s.direct(55,61,200,270) #latitude, longitude, distance, azimuth

will produce tuple of (latitude, longitude, reverse azimuth)

(54.95970446208453, 57.8662593013991, 87.43341127393373)

Inverse issue solution

Is the "inverse" geodesic issue, solve the distance, azimuth and reverse azimuth between two points with assigned coordinates

s.inverse(55,61,54.9597,57.866) #latitude1, longitude1, latitude2, longitude2

will produce tuple of azimuth, reverse azimuth, distance

(270.0000703898066, 87.43326932644362, 200.01656014835072)

Angular issue

solves angular issue: return coordinates of third point of spherical triangle by given coordinates of two points and azimuths to third point from each of two points

s.angular(55,61,55,50,290,80) #latitude1, longitude1, latitude2, longitude2, azimuth_from_1_to_3, azimuth_from_2_to_3

(55.543913134236334, 58.20411810045331)

Linear issue

solves linear issue: return coordinates of third point of spherical triangle by given coordinates of two points and distances to third point from each of two points

s.linear(55,61,55,60,30,40,1) #latitude1, longitude1, latitude2, longitude2, distance_from_1_to_2, distance_from_2_to_3, 1: right of 1-2 line(CW), 0: left of 1-2 line (CCW)

(55.12911870348598, 60.586321710092335)

Distance calculation

return distance between two points (as a part of inverse issue)

s.distance(55,61,54.9597,57.866) #latitude1, latitude2, longitude1, longitude2

200.01656014835072

Azimuth calculation

return initial azimuth from first point to second point (as a part of inverse issue)

s.azimuth(55,61,54.9597,57.866)

270.0000703898066

Bearing calculation

returns bearing (also known as reverse azimuth) from second to first point (as a part of inverse issue)

s.bearing(55,61,54.9597,57.866)

87.43326932644362

Conversation from decimal to IVAC2 (Icarus Versatile ATC Client 2)

s.to_ivac(54.9597,'lat') #coords, type(lat or lon)

will produce IVAC2 format coordinate

'N54573492'

and for "longitudes"

s.to_ivac(57.866,'lon')

'E057515760'

Conversation from IVAC2 (Icarus Versatile ATC Client 2) to decimal

s.from_ivac('E057515760')

produce the decimal representation of given coordinate

57.866

bth2008/python_spheric