def test_galactic2ecliptic_individual():
from aplpy.wcs_util import fk52gal, gal2fk5
r = ComponentLink([L, B], R, lb2ra)
d = ComponentLink([L, B], R, lb2dec)
l = ComponentLink([R, D], L, radec2glon)
b = ComponentLink([R, D], B, radec2glat)
x = np.array([0])
y = np.array([0])
check_using(l, (x, y), fk52gal(x, y)[0])
check_using(b, (x, y), fk52gal(x, y)[1])
check_using(r, (x, y), gal2fk5(x, y)[0])
check_using(d, (x, y), gal2fk5(x, y)[1])
def test_Galactic2Equatorial():
from aplpy.wcs_util import fk52gal, gal2fk5
result = Galactic2Equatorial(L, B, R, D)
assert len(result) == 4
check_link(result[0], [R, D], L)
check_link(result[1], [R, D], B)
check_link(result[2], [L, B], R)
check_link(result[3], [L, B], D)
x = np.array([0])
y = np.array([0])
check_using(result[0], (x, y), fk52gal(x, y)[0])
check_using(result[1], (x, y), fk52gal(x, y)[1])
check_using(result[2], (x, y), gal2fk5(x, y)[0])
check_using(result[3], (x, y), gal2fk5(x, y)[1])
def lb2dec(lat, lon):
"""Compute declination from galactic longitude and latitude"""
return gal2fk5(lat, lon)[1]
def lb2ra(lat, lon):
"""Compute right ascension from galactic longitude and latitude"""
return gal2fk5(lat, lon)[0]