def fwd(self, lons, lats, az, dist, radians=False):
"""
forward transformation - Returns longitudes, latitudes and back
azimuths of terminus points given longitudes (lons) and
latitudes (lats) of initial points, plus forward azimuths (az)
and distances (dist).
latitudes (lats) of initial points, plus forward azimuths (az)
and distances (dist).
Works with numpy and regular python array objects, python
sequences and scalars.
if radians=True, lons/lats and azimuths are radians instead of
degrees. Distances are in meters.
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
inz, zisfloat, zislist, zistuple = _copytobuffer(az)
ind, disfloat, dislist, distuple = _copytobuffer(dist)
self._fwd(inx, iny, inz, ind, radians=radians)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
outz = _convertback(zisfloat, zislist, zistuple, inz)
return outx, outy, outz
def __call__(self, *args, **kw):
# ,lon,lat,inverse=False,errcheck=False):
"""
Calling a Proj class instance with the arguments lon, lat will
convert lon/lat (in degrees) to x/y native map projection
coordinates (in meters). If optional keyword 'inverse' is True
(default is False), the inverse transformation from x/y to
lon/lat is performed. If optional keyword 'errcheck' is True (default is
False) an exception is raised if the transformation is invalid.
If errcheck=False and the transformation is invalid, no
exception is raised and 1.e30 is returned.
Inputs should be doubles (they will be cast to doubles if they
are not, causing a slight performance hit).
Works with numpy and regular python array objects, python
sequences and scalars, but is fastest for array objects.
"""
inverse = kw.get("inverse", False)
errcheck = kw.get("errcheck", False)
lon, lat = args
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(lon)
iny, yisfloat, yislist, yistuple = _copytobuffer(lat)
# call PROJ functions. inx and iny modified in place.
if inverse:
self._inv(inx, iny, errcheck=errcheck)
else:
self._fwd(inx, iny, errcheck=errcheck)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
return outx, outy
def __call__(
self,
longitude: Any,
latitude: Any,
inverse: bool = False,
errcheck: bool = False,
radians: bool = False,
) -> Tuple[Any, Any]:
"""
Calling a Proj class instance with the arguments lon, lat will
convert lon/lat (in degrees) to x/y native map projection
coordinates (in meters).
Inputs should be doubles (they will be cast to doubles if they
are not, causing a slight performance hit).
Works with numpy and regular python array objects, python
sequences and scalars, but is fastest for array objects.
Parameters
----------
longitude: scalar or array (numpy or python)
Input longitude coordinate(s).
latitude: scalar or array (numpy or python)
Input latitude coordinate(s).
inverse: boolean, optional
If inverse is True the inverse transformation from x/y to
lon/lat is performed. Default is False.
radians: boolean, optional
If True, will expect input data to be in radians and will return radians
if the projection is geographic. Default is False (degrees).
This does not work with pyproj 2 and is ignored. It will be enabled again
in pyproj 3.
errcheck: boolean, optional
If True an exception is raised if the errors are found in the process.
By default errcheck=False and ``inf`` is returned.
Returns
-------
Tuple[Any, Any]:
The transformed coordinates.
"""
if radians:
warnings.warn(
"radian input is currently not supported in pyproj 2. "
"Support for radian input will be added in pyproj 3.")
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(longitude)
iny, yisfloat, yislist, yistuple = _copytobuffer(latitude)
# call PROJ functions. inx and iny modified in place.
if inverse:
self._inv(inx, iny, errcheck=errcheck)
else:
self._fwd(inx, iny, errcheck=errcheck)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
return outx, outy
def transform(self, xx, yy, zz=None, radians=False):
"""
Transform points between two coordinate systems.
Parameters
----------
xx: scalar or array (numpy or python)
Input x coordinate(s).
yy: scalar or array (numpy or python)
Input y coordinate(s).
zz: scalar or array (numpy or python), optional
Input z coordinate(s).
radians: boolean, optional
If True, will expect input data to be in radians and will return radians
if the projection is geographic. Default is False (degrees).
Example:
>>> from pyproj import Transformer
>>> transformer = Transformer.from_crs("epsg:4326", "epsg:3857")
>>> x3, y3 = transformer.transform(33, 98)
>>> "%.3f %.3f" % (x3, y3)
'10909310.098 3895303.963'
>>> pipeline_str = "+proj=pipeline +step +proj=longlat +ellps=WGS84 +step +proj=unitconvert +xy_in=rad +xy_out=deg"
>>> pipe_trans = Transformer.from_pipeline(pipeline_str)
>>> xt, yt = pipe_trans.transform(2.1, 0.001)
>>> "%.3f %.3f" % (xt, yt)
'120.321 0.057'
>>> transproj = Transformer.from_proj({"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'}, '+init=EPSG:4326')
>>> xpj, ypj, zpj = transproj.transform(-2704026.010, -4253051.810, 3895878.820, radians=True)
>>> "%.3f %.3f %.3f" % (xpj, ypj, zpj)
'-2.137 0.661 -20.531'
>>> transprojr = Transformer.from_proj('+init=EPSG:4326', {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'})
>>> xpjr, ypjr, zpjr = transprojr.transform(xpj, ypj, zpj, radians=True)
>>> "%.3f %.3f %.3f" % (xpjr, ypjr, zpjr)
'-2704026.010 -4253051.810 3895878.820'
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(xx)
iny, yisfloat, yislist, yistuple = _copytobuffer(yy)
if zz is not None:
inz, zisfloat, zislist, zistuple = _copytobuffer(zz)
else:
inz = None
# call pj_transform. inx,iny,inz buffers modified in place.
self._transformer._transform(inx, iny, inz, radians)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
if inz is not None:
outz = _convertback(zisfloat, zislist, zistuple, inz)
return outx, outy, outz
else:
return outx, outy
def fwd( # pylint: disable=invalid-name
self,
lons: Any,
lats: Any,
az: Any,
dist: Any,
radians=False) -> Tuple[Any, Any, Any]:
"""
Forward transformation
Determine longitudes, latitudes and back azimuths of terminus
points given longitudes and latitudes of initial points,
plus forward azimuths and distances.
Parameters
----------
lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
Longitude(s) of initial point(s)
lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
Latitude(s) of initial point(s)
az: array, :class:`numpy.ndarray`, list, tuple, or scalar
Forward azimuth(s)
dist: array, :class:`numpy.ndarray`, list, tuple, or scalar
Distance(s) between initial and terminus point(s)
in meters
radians: bool, default=False
If True, the input data is assumed to be in radians.
Otherwise, the data is assumed to be in degrees.
Returns
-------
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Longitude(s) of terminus point(s)
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Latitude(s) of terminus point(s)
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Back azimuth(s)
"""
# process inputs, making copies that support buffer API.
inx, x_data_type = _copytobuffer(lons)
iny, y_data_type = _copytobuffer(lats)
inz, z_data_type = _copytobuffer(az)
ind = _copytobuffer(dist)[0]
self._fwd(inx, iny, inz, ind, radians=radians)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(x_data_type, inx)
outy = _convertback(y_data_type, iny)
outz = _convertback(z_data_type, inz)
return outx, outy, outz
def inv(
self,
lons1: Any,
lats1: Any,
lons2: Any,
lats2: Any,
radians: bool = False,
) -> Tuple[Any, Any, Any]:
"""
Inverse transformation
Determine forward and back azimuths, plus distances
between initial points and terminus points.
Parameters
----------
lons1: array, :class:`numpy.ndarray`, list, tuple, or scalar
Longitude(s) of initial point(s)
lats1: array, :class:`numpy.ndarray`, list, tuple, or scalar
Latitude(s) of initial point(s)
lons2: array, :class:`numpy.ndarray`, list, tuple, or scalar
Longitude(s) of terminus point(s)
lats2: array, :class:`numpy.ndarray`, list, tuple, or scalar
Latitude(s) of terminus point(s)
radians: bool, default=False
If True, the input data is assumed to be in radians.
Otherwise, the data is assumed to be in degrees.
Returns
-------
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Forward azimuth(s)
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Back azimuth(s)
array, :class:`numpy.ndarray`, list, tuple, or scalar:
Distance(s) between initial and terminus point(s)
in meters
"""
# process inputs, making copies that support buffer API.
inx, x_data_type = _copytobuffer(lons1)
iny, y_data_type = _copytobuffer(lats1)
inz, z_data_type = _copytobuffer(lons2)
ind = _copytobuffer(lats2)[0]
self._inv(inx, iny, inz, ind, radians=radians)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(x_data_type, inx)
outy = _convertback(y_data_type, iny)
outz = _convertback(z_data_type, inz)
return outx, outy, outz
def line_lengths(self, lons: Any, lats: Any, radians: bool = False) -> Any:
"""
.. versionadded:: 2.3.0
Calculate the distances between points along a line.
>>> from pyproj import Geod
>>> geod = Geod(ellps="WGS84")
>>> lats = [-72.9, -71.9, -74.9]
>>> lons = [-74, -102, -102]
>>> for line_length in geod.line_lengths(lons, lats):
... f"{line_length:.3f}"
'943065.744'
'334805.010'
Parameters
----------
lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
The longitude points along a line.
lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
The latitude points along a line.
radians: bool, optional
If True, the input data is assumed to be in radians.
Returns
-------
array, :class:`numpy.ndarray`, list, tuple, or scalar:
The total length of the line.
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
self._line_length(inx, iny, radians=radians)
line_lengths = _convertback(xisfloat, xislist, xistuple, inx)
return line_lengths if xisfloat else line_lengths[:-1]
def __call__(self, *args, **kw):
# ,lon,lat,inverse=False,errcheck=False):
"""
Calling a Proj class instance with the arguments lon, lat will
convert lon/lat (in degrees) to x/y native map projection
coordinates (in meters). If optional keyword 'inverse' is True
(default is False), the inverse transformation from x/y to
lon/lat is performed. If optional keyword 'errcheck' is True (default is
False) an exception is raised if the transformation is invalid.
If errcheck=False and the transformation is invalid, no
exception is raised and 1.e30 is returned.
Inputs should be doubles (they will be cast to doubles if they
are not, causing a slight performance hit).
Works with numpy and regular python array objects, python
sequences and scalars, but is fastest for array objects.
"""
inverse = kw.get("inverse", False)
errcheck = kw.get("errcheck", False)
# if len(args) == 1:
# latlon = np.array(args[0], copy=True,
# order='C', dtype=float, ndmin=2)
# if inverse:
# _proj.Proj._invn(self, latlon, radians=radians, errcheck=errcheck)
# else:
# _proj.Proj._fwdn(self, latlon, radians=radians, errcheck=errcheck)
# return latlon
lon, lat = args
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(lon)
iny, yisfloat, yislist, yistuple = _copytobuffer(lat)
# call proj4 functions. inx and iny modified in place.
if inverse:
self._inv(inx, iny, errcheck=errcheck)
else:
self._fwd(inx, iny, errcheck=errcheck)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
return outx, outy
def inv(self, lons1, lats1, lons2, lats2, radians=False):
"""
inverse transformation - Returns forward and back azimuths, plus
distances between initial points (specified by lons1, lats1) and
terminus points (specified by lons2, lats2).
Works with numpy and regular python array objects, python
sequences and scalars.
if radians=True, lons/lats and azimuths are radians instead of
degrees. Distances are in meters.
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(lons1)
iny, yisfloat, yislist, yistuple = _copytobuffer(lats1)
inz, zisfloat, zislist, zistuple = _copytobuffer(lons2)
ind, disfloat, dislist, distuple = _copytobuffer(lats2)
self._inv(inx, iny, inz, ind, radians=radians)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
outz = _convertback(zisfloat, zislist, zistuple, inz)
return outx, outy, outz
def transform(
self,
xx,
yy,
zz=None,
tt=None,
radians=False,
errcheck=False,
direction=TransformDirection.FORWARD,
):
"""
Transform points between two coordinate systems.
.. versionadded:: 2.1.1 errcheck
.. versionadded:: 2.2.0 direction
Parameters
----------
xx: scalar or array (numpy or python)
Input x coordinate(s).
yy: scalar or array (numpy or python)
Input y coordinate(s).
zz: scalar or array (numpy or python), optional
Input z coordinate(s).
tt: scalar or array (numpy or python), optional
Input time coordinate(s).
radians: boolean, optional
If True, will expect input data to be in radians and will return radians
if the projection is geographic. Default is False (degrees). Ignored for
pipeline transformations.
errcheck: boolean, optional (default False)
If True an exception is raised if the transformation is invalid.
By default errcheck=False and an invalid transformation
returns ``inf`` and no exception is raised.
direction: ~pyproj.enums.TransformDirection, optional
The direction of the transform.
Default is :attr:`~pyproj.enums.TransformDirection.FORWARD`.
Example:
>>> from pyproj import Transformer
>>> transformer = Transformer.from_crs("epsg:4326", "epsg:3857")
>>> x3, y3 = transformer.transform(33, 98)
>>> "%.3f %.3f" % (x3, y3)
'10909310.098 3895303.963'
>>> pipeline_str = (
... "+proj=pipeline +step +proj=longlat +ellps=WGS84 "
... "+step +proj=unitconvert +xy_in=rad +xy_out=deg"
... )
>>> pipe_trans = Transformer.from_pipeline(pipeline_str)
>>> xt, yt = pipe_trans.transform(2.1, 0.001)
>>> "%.3f %.3f" % (xt, yt)
'120.321 0.057'
>>> transproj = Transformer.from_crs(
... {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'},
... "EPSG:4326",
... always_xy=True,
... )
>>> xpj, ypj, zpj = transproj.transform(
... -2704026.010,
... -4253051.810,
... 3895878.820,
... radians=True,
... )
>>> "%.3f %.3f %.3f" % (xpj, ypj, zpj)
'-2.137 0.661 -20.531'
>>> transprojr = Transformer.from_crs(
... "EPSG:4326",
... {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'},
... always_xy=True,
... )
>>> xpjr, ypjr, zpjr = transprojr.transform(xpj, ypj, zpj, radians=True)
>>> "%.3f %.3f %.3f" % (xpjr, ypjr, zpjr)
'-2704026.010 -4253051.810 3895878.820'
>>> transformer = Transformer.from_proj("epsg:4326", 4326, skip_equivalent=True)
>>> xeq, yeq = transformer.transform(33, 98)
>>> "%.0f %.0f" % (xeq, yeq)
'33 98'
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(xx)
iny, yisfloat, yislist, yistuple = _copytobuffer(yy)
if zz is not None:
inz, zisfloat, zislist, zistuple = _copytobuffer(zz)
else:
inz = None
if tt is not None:
intime, tisfloat, tislist, tistuple = _copytobuffer(tt)
else:
intime = None
# call pj_transform. inx,iny,inz buffers modified in place.
self._transformer._transform(
inx,
iny,
inz=inz,
intime=intime,
direction=direction,
radians=radians,
errcheck=errcheck,
)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(xisfloat, xislist, xistuple, inx)
outy = _convertback(yisfloat, yislist, xistuple, iny)
return_data = (outx, outy)
if inz is not None:
return_data += (_convertback(zisfloat, zislist, zistuple, inz), )
if intime is not None:
return_data += (_convertback(tisfloat, tislist, tistuple,
intime), )
return return_data
def transform( # pylint: disable=invalid-name
self,
xx,
yy,
zz=None,
tt=None,
radians=False,
errcheck=False,
direction=TransformDirection.FORWARD,
inplace=False,
):
"""
Transform points between two coordinate systems.
.. versionadded:: 2.1.1 errcheck
.. versionadded:: 2.2.0 direction
.. versionadded:: 3.2.0 inplace
Parameters
----------
xx: scalar or array (numpy or python)
Input x coordinate(s).
yy: scalar or array (numpy or python)
Input y coordinate(s).
zz: scalar or array (numpy or python), optional
Input z coordinate(s).
tt: scalar or array (numpy or python), optional
Input time coordinate(s).
radians: bool, default=False
If True, will expect input data to be in radians and will return radians
if the projection is geographic. Otherwise, it uses degrees.
Ignored for pipeline transformations with pyproj 2,
but will work in pyproj 3.
errcheck: bool, default=False
If True, an exception is raised if the errors are found in the process.
If False, ``inf`` is returned for errors.
direction: pyproj.enums.TransformDirection, optional
The direction of the transform.
Default is :attr:`pyproj.enums.TransformDirection.FORWARD`.
inplace: bool, default=False
If True, will attempt to write the results to the input array
instead of returning a new array. This will fail if the input
is not an array in C order with the double data type.
Example
--------
>>> from pyproj import Transformer
>>> transformer = Transformer.from_crs("epsg:4326", "epsg:3857")
>>> x3, y3 = transformer.transform(33, 98)
>>> f"{x3:.3f} {y3:.3f}"
'10909310.098 3895303.963'
>>> pipeline_str = (
... "+proj=pipeline +step +proj=longlat +ellps=WGS84 "
... "+step +proj=unitconvert +xy_in=rad +xy_out=deg"
... )
>>> pipe_trans = Transformer.from_pipeline(pipeline_str)
>>> xt, yt = pipe_trans.transform(2.1, 0.001)
>>> f"{xt:.3f} {yt:.3f}"
'2.100 0.001'
>>> transproj = Transformer.from_crs(
... {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'},
... "EPSG:4326",
... always_xy=True,
... )
>>> xpj, ypj, zpj = transproj.transform(
... -2704026.010,
... -4253051.810,
... 3895878.820,
... radians=True,
... )
>>> f"{xpj:.3f} {ypj:.3f} {zpj:.3f}"
'-2.137 0.661 -20.531'
>>> transprojr = Transformer.from_crs(
... "EPSG:4326",
... {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'},
... always_xy=True,
... )
>>> xpjr, ypjr, zpjr = transprojr.transform(xpj, ypj, zpj, radians=True)
>>> f"{xpjr:.3f} {ypjr:.3f} {zpjr:.3f}"
'-2704026.010 -4253051.810 3895878.820'
>>> transformer = Transformer.from_proj("epsg:4326", 4326)
>>> xeq, yeq = transformer.transform(33, 98)
>>> f"{xeq:.0f} {yeq:.0f}"
'33 98'
"""
# process inputs, making copies that support buffer API.
inx, x_data_type = _copytobuffer(xx, inplace=inplace)
iny, y_data_type = _copytobuffer(yy, inplace=inplace)
if zz is not None:
inz, z_data_type = _copytobuffer(zz, inplace=inplace)
else:
inz = None
if tt is not None:
intime, t_data_type = _copytobuffer(tt, inplace=inplace)
else:
intime = None
# call pj_transform. inx,iny,inz buffers modified in place.
self._transformer._transform(
inx,
iny,
inz=inz,
intime=intime,
direction=direction,
radians=radians,
errcheck=errcheck,
)
# if inputs were lists, tuples or floats, convert back.
outx = _convertback(x_data_type, inx)
outy = _convertback(y_data_type, iny)
return_data: Tuple[Any, ...] = (outx, outy)
if inz is not None:
return_data += (_convertback(z_data_type, inz), )
if intime is not None:
return_data += (_convertback(t_data_type, intime), )
return return_data
def get_factors(
self, longitude, latitude, radians=False, errcheck=False,
):
"""
.. versionadded:: 2.6.0
Calculate various cartographic properties, such as scale factors, angular
distortion and meridian convergence. Depending on the underlying projection
values will be calculated either numerically (default) or analytically.
The function also calculates the partial derivatives of the given
coordinate.
Parameters
----------
longitude: scalar or array (numpy or python)
Input longitude coordinate(s).
latitude: scalar or array (numpy or python)
Input latitude coordinate(s).
radians: boolean, optional
If True, will expect input data to be in radians.
Default is False (degrees).
errcheck: boolean, optional (default False)
If True an exception is raised if the errors are found in the process.
By default errcheck=False and ``inf`` is returned.
Returns
-------
Factors
"""
# process inputs, making copies that support buffer API.
inx, xisfloat, xislist, xistuple = _copytobuffer(longitude)
iny, yisfloat, yislist, yistuple = _copytobuffer(latitude)
# calculate the factors
factors = self._get_factors(inx, iny, radians=radians, errcheck=errcheck)
# if inputs were lists, tuples or floats, convert back.
return Factors(
meridional_scale=_convertback(
xisfloat, xislist, xistuple, factors.meridional_scale
),
parallel_scale=_convertback(
xisfloat, xislist, xistuple, factors.parallel_scale
),
areal_scale=_convertback(xisfloat, xislist, xistuple, factors.areal_scale),
angular_distortion=_convertback(
xisfloat, xislist, xistuple, factors.angular_distortion
),
meridian_parallel_angle=_convertback(
xisfloat, xislist, xistuple, factors.meridian_parallel_angle
),
meridian_convergence=_convertback(
xisfloat, xislist, xistuple, factors.meridian_convergence
),
tissot_semimajor=_convertback(
xisfloat, xislist, xistuple, factors.tissot_semimajor
),
tissot_semiminor=_convertback(
xisfloat, xislist, xistuple, factors.tissot_semiminor
),
dx_dlam=_convertback(xisfloat, xislist, xistuple, factors.dx_dlam),
dx_dphi=_convertback(xisfloat, xislist, xistuple, factors.dx_dphi),
dy_dlam=_convertback(xisfloat, xislist, xistuple, factors.dy_dlam),
dy_dphi=_convertback(xisfloat, xislist, xistuple, factors.dy_dphi),
)
