lsst.geom._SpherePoint.SpherePoint Class Reference

Public Member Functions
def	__iter__ (self)
def	__repr__ (self)

Static Public Member Functions
def	toUnitXYZ (*longitude=None, latitude=None, ra=None, dec=None, units)

Detailed Description

Definition at line 38 of file _SpherePoint.py.

Member Function Documentation

__iter__()

def lsst.geom._SpherePoint.SpherePoint.__iter__

(

self

)

Definition at line 40 of file _SpherePoint.py.

    def __iter__(self):
        for i in (0, 1):
            yield self[i]
 

__repr__()

def lsst.geom._SpherePoint.SpherePoint.__repr__

(

self

)

Definition at line 44 of file _SpherePoint.py.

    def __repr__(self):
        argList = ["%r*geom.degrees" % (pos.asDegrees(),) for pos in self]
        return "SpherePoint(%s)" % (", ".join(argList))
 

toUnitXYZ()

def lsst.geom._SpherePoint.SpherePoint.toUnitXYZ ( *  longitude = None,   latitude = None,   ra = None,   dec = None,   units  )

static

Compute the unit 3-vectors (as separate arrays) corresponding to
arrays of longitude and latitude.

Parameters
----------
longitude : `float` or `numpy.ndarray`
    Longitude coordinate of input points.
latitude : `float` or `numpy.ndarray`
    Latitude coordinate of input points.
ra : `float` or `numpy.ndarray`
    Synonym for `longitude`.
dec : `float` or `numpy.ndarray`
    Synonym for `latitude`.
units : `AngleUnit`
    Angle unit for inputs.

Returns
-------
x : `float` or numpy.ndarray`
    X coordinates of unit 3-vectors.
y : `float` or numpy.ndarray`
    Y coordinates of unit 3-vectors.
z : `float` or numpy.ndarray`
    Z coordinates of unit 3-vectors.

Notes
-----
The returned Cartesian coordinate values are not guaranteed to be
normalized according to the conventions of `sphgeom.UnitVector3d`, but
are nevertheless compatible with the various vectorized `contains`
methods in `sphgeom` because those apply that normalization
internally.

Definition at line 49 of file _SpherePoint.py.

    def toUnitXYZ(*, longitude=None, latitude=None, ra=None, dec=None, units):
        """Compute the unit 3-vectors (as separate arrays) corresponding to
        arrays of longitude and latitude.
 
        Parameters
        ----------
        longitude : `float` or `numpy.ndarray`
            Longitude coordinate of input points.
        latitude : `float` or `numpy.ndarray`
            Latitude coordinate of input points.
        ra : `float` or `numpy.ndarray`
            Synonym for `longitude`.
        dec : `float` or `numpy.ndarray`
            Synonym for `latitude`.
        units : `AngleUnit`
            Angle unit for inputs.
 
        Returns
        -------
        x : `float` or numpy.ndarray`
            X coordinates of unit 3-vectors.
        y : `float` or numpy.ndarray`
            Y coordinates of unit 3-vectors.
        z : `float` or numpy.ndarray`
            Z coordinates of unit 3-vectors.
 
        Notes
        -----
        The returned Cartesian coordinate values are not guaranteed to be
        normalized according to the conventions of `sphgeom.UnitVector3d`, but
        are nevertheless compatible with the various vectorized `contains`
        methods in `sphgeom` because those apply that normalization
        internally.
        """
        factor = (1.0*units).asRadians()
        lon = factor*_pickExactlyOne(longitude, ra, "Exactly one of ra and longitude must be provided.")
        lat = factor*_pickExactlyOne(latitude, dec, "Exactly one of dec and latitude must be provided.")
        return _toUnitX(lon, lat), _toUnitY(lon, lat), _toUnitZ(lon, lat)

---

The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-0.7.0/Linux64/geom/22.0.1-5-g096abc9+d18c45d440/python/lsst/geom/_SpherePoint.py