139 lines
2.9 KiB
Python
139 lines
2.9 KiB
Python
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"""``geopy.units`` module provides utility functions for performing
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angle and distance unit conversions.
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Some shortly named aliases are provided for convenience (e.g.
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:func:`.km` is an alias for :func:`.kilometers`).
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"""
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import math
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# Angles
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def degrees(radians=0, arcminutes=0, arcseconds=0):
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"""
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Convert angle to degrees.
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"""
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deg = 0.
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if radians:
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deg = math.degrees(radians)
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if arcminutes:
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deg += arcminutes / arcmin(degrees=1.)
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if arcseconds:
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deg += arcseconds / arcsec(degrees=1.)
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return deg
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def radians(degrees=0, arcminutes=0, arcseconds=0):
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"""
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Convert angle to radians.
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"""
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if arcminutes:
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degrees += arcminutes / arcmin(degrees=1.)
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if arcseconds:
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degrees += arcseconds / arcsec(degrees=1.)
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return math.radians(degrees)
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def arcminutes(degrees=0, radians=0, arcseconds=0):
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"""
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Convert angle to arcminutes.
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"""
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if radians:
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degrees += math.degrees(radians)
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if arcseconds:
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degrees += arcseconds / arcsec(degrees=1.)
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return degrees * 60.
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def arcseconds(degrees=0, radians=0, arcminutes=0):
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"""
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Convert angle to arcseconds.
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"""
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if radians:
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degrees += math.degrees(radians)
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if arcminutes:
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degrees += arcminutes / arcmin(degrees=1.)
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return degrees * 3600.
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# Lengths
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def kilometers(meters=0, miles=0, feet=0, nautical=0):
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"""
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Convert distance to kilometers.
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"""
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ret = 0.
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if meters:
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ret += meters / 1000.
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if feet:
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ret += feet / ft(1.)
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if nautical:
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ret += nautical / nm(1.)
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ret += miles * 1.609344
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return ret
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def meters(kilometers=0, miles=0, feet=0, nautical=0):
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"""
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Convert distance to meters.
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"""
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return (kilometers + km(nautical=nautical, miles=miles, feet=feet)) * 1000
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def miles(kilometers=0, meters=0, feet=0, nautical=0):
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"""
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Convert distance to miles.
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"""
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ret = 0.
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if nautical:
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kilometers += nautical / nm(1.)
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if feet:
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kilometers += feet / ft(1.)
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if meters:
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kilometers += meters / 1000.
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ret += kilometers / 1.609344
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return ret
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def feet(kilometers=0, meters=0, miles=0, nautical=0):
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"""
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Convert distance to feet.
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"""
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ret = 0.
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if nautical:
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kilometers += nautical / nm(1.)
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if meters:
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kilometers += meters / 1000.
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if kilometers:
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miles += mi(kilometers=kilometers)
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ret += miles * 5280
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return ret
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def nautical(kilometers=0, meters=0, miles=0, feet=0):
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"""
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Convert distance to nautical miles.
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"""
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ret = 0.
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if feet:
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kilometers += feet / ft(1.)
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if miles:
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kilometers += km(miles=miles)
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if meters:
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kilometers += meters / 1000.
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ret += kilometers / 1.852
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return ret
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# Compatible names
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rad = radians
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arcmin = arcminutes
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arcsec = arcseconds
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km = kilometers
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m = meters
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mi = miles
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ft = feet
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nm = nautical
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