lsst.skymap.healpixSkyMap Namespace Reference

Classes
class	HealpixSkyMap
class	HealpixSkyMapConfig
class	HealpixTractInfo

Functions
	angToCoord (thetaphi)
	coordToAng (coord)

Function Documentation

angToCoord()

lsst.skymap.healpixSkyMap.angToCoord

(

thetaphi

)

Convert hpgeom ang to an lsst.geom.SpherePoint

The angle is provided as a single object, thetaphi, so the output
of hpgeom functions can be directed to this function without
additional translation.

Definition at line 36 of file healpixSkyMap.py.

def angToCoord(thetaphi):
    """Convert hpgeom ang to an lsst.geom.SpherePoint
 
    The angle is provided as a single object, thetaphi, so the output
    of hpgeom functions can be directed to this function without
    additional translation.
    """
    return geom.SpherePoint(float(thetaphi[1]), float(thetaphi[0] - 0.5*numpy.pi), geom.radians)
 
 

coordToAng()

lsst.skymap.healpixSkyMap.coordToAng

(

coord

)

Convert an lsst.geom.SpherePoint to a hpgeom ang (theta, phi)

The Healpix convention is that 0 <= theta <= pi, 0 <= phi < 2pi.

Definition at line 46 of file healpixSkyMap.py.

def coordToAng(coord):
    """Convert an lsst.geom.SpherePoint to a hpgeom ang (theta, phi)
 
    The Healpix convention is that 0 <= theta <= pi, 0 <= phi < 2pi.
    """
    return (coord.getLatitude().asRadians() + 0.5*numpy.pi, coord.getLongitude().asRadians())