A pure Python implementation of geodesy tools for various ellipsoidal
and spherical earth models using precision trigonometric and vector-based
methods for geodetic (lat-/longitude) and geocentric cartesian (x/y/z)
coordinates.
The tests have been run with 64-bit Python 2.6.9, 2.7.13, 3.5.3 and
3.6.1, but only on MacOSX 10.10 Yosemite, MacOSX 10.11 El Capitan or
macOS 10.12.2, 10.12.3, 10.12.4 or 10.12.5 Sierra and with Pythonista 3.1
using Python 2.7.12 and 3.5.1 on iOS 10.3.2.
Some function and method names differ from the JavaScript version. In
such cases documentation tag JS name: shows the original
JavaScript name.
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isclockwise(points,
radius=None)
Determine the direction of a polygon defined by a list, sequence, set
or tuple of LatLon points. |
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isconvex(points,
radius=None)
Determine whether a polygon defined by a list, sequence, set or tuple
of LatLon points is convex. |
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bearingDMS(bearing,
form=' d ' ,
prec=None,
sep='
' )
Convert bearing to a string. |
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cbrt(x)
Compute the cubic root x**(1/3). |
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cbrt2(x)
Compute the cubic root squared x**(2/3). |
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compassDMS(bearing,
form=' d ' ,
prec=None,
sep='
' )
Convert bearing to a string suffixed with compass point. |
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compassPoint(bearing,
prec=3)
Convert bearing to a compass point. |
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degrees(x)
Convert angle x from radians to degrees. |
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degrees180(rad)
Convert and wrap radians to degrees -180..+180. |
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degrees360(rad)
Convert and wrap radians to degrees 0..+360. |
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degrees90(rad)
Convert and wrap radians to degrees -270..+90. |
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fStr(floats,
prec=6,
sep=' , ' ,
fmt=' %.*f ' ,
ints=False)
Convert floats to string, optionally with trailing zero decimals
stripped. |
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fStrzs(fstr)
Strip trailing zero decimals from a float string. |
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false2f(value,
name=' value ' ,
false=True)
Convert a false east-/northing to non-negative float. |
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favg(v1,
v2,
f=0.5)
Return the weighted average of two values. |
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fdot(a,
*b)
Return the precision dot product sum(a[i] * b[i] for
i in range(len(a))). |
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fdot3(a,
b,
c,
start=0)
Return the precision dot product sum(a[i] * b[i] *
c[i] for i in range(len(a))) + start. |
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fsum(iterable)
Return an accurate floating point sum of values in the iterable. |
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ft2m(feet)
Convert feet to meter (m). |
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halfs(str2)
Split a string in 2 halfs. |
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hsin(rad)
Compute the Haversine value of an angle. |
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hsin3(a2,
a1,
b21)
Compute the angular distance using the Haversine formula. |
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hypot(x,
y)
Return the Euclidean distance, sqrt(x*x + y*y). |
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hypot1(x)
Compute the norm sqrt(1 + x**2). |
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hypot3(x,
y,
z)
Compute the norm sqrt(x**2 + y**2 + z**2). |
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isint(obj,
both=False)
Check for integer types and value. |
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latDMS(deg,
form=' dms ' ,
prec=2,
sep='
' )
Convert latitude to a string suffixed with N or S. |
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len2(xtor)
Make built-in len () function work for
generators, iterators, etc. |
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lonDMS(deg,
form=' dms ' ,
prec=2,
sep='
' )
Convert longitude to a string suffixed with E or W. |
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m2NM(meter)
Convert meter to nautical miles (NM). |
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m2SM(meter)
Convert meter to statute miles (SM). |
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m2ft(meter)
Convert meter to feet (ft). |
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m2km(meter)
Convert meter to kilo meter (km). |
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map1(func,
*args)
Apply each argument to a single-argument function and returns a tuple
of results. |
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map2(func,
*args)
Apply arguments to a function and returns a tuple of results. |
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normDMS(strDMS,
norm='
' )
Normalize all degree ˚, minute ' and second " symbols in a
string to the default symbols °, ′ and ″. |
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parse3llh(strll,
height=0,
sep=' , ' )
Parse a string representing lat-, longitude and height point. |
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parseDMS(strDMS,
suffix=' NSEW ' ,
sep='
' )
Parse a string representing deg°min′sec″ to degrees. |
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parseMGRS(strMGRS,
datum=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran... )
Parse a string representing a MGRS grid reference, consisting of
zoneBand, grid, easting and northing. |
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parseOSGR(strOSGR)
Parse an OSGR coordinate string to an Osgr instance. |
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parseUTM(strUTM,
datum=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran... )
Parse a string representing a UTM coordinate, consisting of zone,
hemisphere, easting and northing. |
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precision(form,
prec=None)
Set the default precison for a given F_ form. |
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radians(x)
Convert angle x from degrees to radians. |
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radiansPI(deg)
Convert and wrap degrees to radians -PI..+PI. |
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radiansPI2(deg)
Convert and wrap degrees to radians 0..+2PI. |
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radiansPI_2(deg)
Convert and wrap degrees to radians -3PI/2..+PI/2. |
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simplify1(points,
distance,
radius=6371008.77141,
adjust=True)
Basic simplification of a path of LatLon points. |
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simplify2(points,
pipe,
radius=6371008.77141,
adjust=True,
shortest=False)
Pipe simplification of a path of LatLon points. |
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simplifyRDP(points,
distance,
radius=6371008.77141,
adjust=True,
shortest=False)
Ramer-Douglas-Peucker (RDP) simplification of a path of LatLon
points. |
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simplifyRDPm(points,
distance,
radius=6371008.77141,
adjust=True,
shortest=False)
Modified Ramer-Douglas-Peucker (RDP) simplification of a path of
LatLon points. |
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simplifyVW(points,
area,
radius=6371008.77141,
adjust=True,
attr=None)
Visvalingam-Whyatt (VW) simplification of a path of LatLon
points. |
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simplifyVWm(points,
area,
radius=6371008.77141,
adjust=True,
attr=None)
Modified Visvalingam-Whyatt (VW) simplification of a path of
LatLon points. |
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tanPI_2_2(rad)
Compute tan of half angle, rotated. |
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toDMS(deg,
form=' dms ' ,
prec=2,
sep='
' ,
ddd=2,
neg=' - ' ,
pos='
' )
Convert signed degrees to string, without suffix. |
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toLcc(latlon,
conic=Conic(name='WRF_Lb', lat0=40.0, lon0=-97.0, par1=33.0, par2=45... ,
height=None,
Lcc=<class 'pygeodesy.lcc.Lcc'>)
Convert an (ellipsoidal) geodetic point to a Lambert location. |
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toMgrs(utm,
Mgrs=<class 'pygeodesy.mgrs.Mgrs'>)
Convert a UTM coordinate to an MGRS grid reference. |
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toOsgr(latlon,
lon=None,
datum=Datum(name='WGS84', ellipsoid=Ellipsoids.WGS84, transform=Tran... ,
Osgr=<class 'pygeodesy.osgr.Osgr'>)
Convert a lat-/longitude point to an OSGR coordinate. |
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toUtm(latlon,
lon=None,
datum=None,
Utm=<class 'pygeodesy.utm.Utm'>)
Convert a lat-/longitude point to a UTM coordinate. |
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wrap180(deg)
Wrap degrees to -180..+180. |
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wrap360(deg)
Wrap degrees to 0..+360. |
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wrap90(deg)
Wrap degrees to -270..+90. |
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wrapPI(rad)
Wrap radians to -PI..+PI. |
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wrapPI2(rad)
Wrap radians to 0..+2PI. |
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wrapPI_2(rad)
Wrap radians to -3PI/2..+PI/2. |
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version = ' 17.6.19 '
Normalized PyGeodesy version (string).
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Conics = Conics.Be08Lb: Conic(name='Be08Lb', lat0=50.797815, l...
Registered conics (enum).
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Datums = Datums.BD72: Datum(name='BD72', ellipsoid=Ellipsoids....
Registered datums (enum).
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EPS = 2.22044604925e-16
System's epsilon (float)
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EPS1 = 1.0
1 - EPS (float), about 0.9999999999999998
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EPS2 = 1.49011611938e-08
sqrt(EPS) (float)
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Ellipsoids = Ellipsoids.Airy1830: Ellipsoid(name='Airy1830', a...
Registered ellipsoids (enum).
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F_D = ' d '
Format degrees as deg° (string).
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F_DEG = ' deg '
Format degrees as [D]DD without symbol (string).
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F_DM = ' dm '
Format degrees as deg°min′ (string).
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F_DMS = ' dms '
Format degrees as deg°min′sec″ (string).
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F_MIN = ' min '
Format degrees as [D]DDMM without symbols (string).
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F_RAD = ' rad '
Convert degrees to radians and format as RR (string).
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F_SEC = ' sec '
Format degrees as [D]DDMMSS without symbols (string).
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PI = 3.14159265359
Constant math.pi (float)
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PI2 = 6.28318530718
Two PI, math.pi * 2 (float)
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PI_2 = 1.57079632679
Half PI, math.pi / 2 (float)
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R_KM = 6371.00877142
Mean, spherical earth radius (kilo meter).
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R_M = 6371008.77141
Mean, spherical earth radius (meter).
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R_NM = 3440.06953447
Mean, spherical earth radius (nautical miles).
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R_SM = 3958.75339537
Mean, spherical earth radius (statute miles).
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S_DEG = ' \xc2\xb0 '
Degrees symbol ° (string).
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S_MIN = ' \xe2\x80\xb2 '
Minutes symbol ′ (string).
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S_RAD = '
'
Radians symbol (string).
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S_SEC = ' \xe2\x80\xb3 '
Seconds symbol ″ (string).
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S_SEP = '
'
Separator between deg°, min′ and sec″ (string).
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Transforms = Transforms.BD72: Transform(name='BD72', tx=106.86...
Registered transforms (enum).
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