def test_wcsgroupcat_recalc_catalog_radec(mock_fits_wcs, rect_imcat):
ra, dec = mock_fits_wcs.all_pix2world(rect_imcat.catalog['x'],
rect_imcat.catalog['y'], 0)
refcat = Table([ra, dec], names=('RA', 'DEC'))
ref = RefCatalog(refcat)
wim1 = copy.deepcopy(rect_imcat)
wim2 = copy.deepcopy(rect_imcat)
g = WCSGroupCatalog(wim1)
ra = g.catalog['RA']
dec = g.catalog['DEC']
# artificially add another image:
g._images.append(wim2)
g.recalc_catalog_radec()
assert np.allclose(g.catalog['RA'], ra)
assert np.allclose(g.catalog['DEC'], dec)
g.align_to_ref(ref)
mcat = g.get_matched_cat()
assert len(mcat) == 5
assert np.allclose(mcat['RA'], ra)
assert np.allclose(mcat['DEC'], dec)
del g.catalog['RA']
del g.catalog['DEC']
with pytest.raises(RuntimeError):
g.calc_tanp_xy(None)
def test_wcsgroupcat_match2ref(mock_fits_wcs, rect_imcat):
ra, dec = mock_fits_wcs.all_pix2world(rect_imcat.catalog['x'],
rect_imcat.catalog['y'], 0)
refcat = Table([ra[:-1], dec[:-1]], names=('RA', 'DEC'))
ref = RefCatalog(refcat)
# unequal catalog lengths
g = WCSGroupCatalog(rect_imcat)
with pytest.raises(ValueError):
g.match2ref(ref, match=None)
refcat = Table([ra, dec], names=('RA', 'DEC'))
ref = RefCatalog(refcat)
# call calc_tanp_xy before matching
with pytest.raises(RuntimeError) as e:
g.match2ref(ref, match=TPMatch())
assert (e.value.args[0] == "'calc_tanp_xy()' should have been run "
"prior to match2ref()")
ref.calc_tanp_xy(rect_imcat.tpwcs)
g.calc_tanp_xy(rect_imcat.tpwcs)
g.catalog['matched_ref_id'] = np.ones(5, dtype=bool)
g.catalog['_raw_matched_ref_idx'] = np.ones(5, dtype=bool)
g.match2ref(ref, match=TPMatch())
def test_wcsgroupcat_intersections(mock_fits_wcs, rect_imcat):
g = WCSGroupCatalog(rect_imcat)
pts1 = list(g.polygon.points)[0]
pts2 = list(g.intersection(g.polygon).points)[0]
for pt1 in pts1:
assert any(np.allclose(pt1, pt2) for pt2 in pts2)
pts2 = list(g.intersection(g).points)[0]
for pt1 in pts1:
assert any(np.allclose(pt1, pt2) for pt2 in pts2)
assert np.allclose(
g.intersection_area(g), 2.9904967391303217e-12, atol=0.0, rtol=5.0e-4
)
def test_wcsgroupcat_fit2ref(mock_fits_wcs, caplog, rect_imcat):
ra, dec = mock_fits_wcs.all_pix2world(rect_imcat.catalog['x'],
rect_imcat.catalog['y'], 0)
refcat = Table([ra, dec], names=('RA', 'DEC'))
ref = RefCatalog(refcat)
ref.calc_tanp_xy(rect_imcat.tpwcs)
g = WCSGroupCatalog(rect_imcat)
g.calc_tanp_xy(rect_imcat.tpwcs)
g.match2ref(ref)
g.fit2ref(ref, rect_imcat.tpwcs, fitgeom='shift')
g.apply_affine_to_wcs(g[0].tpwcs, np.identity(2), np.zeros(2))
g._images = []
g.align_to_ref(ref)
assert caplog.record_tuples[-1][-1].endswith("Nothing to align.")
def test_wcsgroupcat_create_group_catalog(mock_fits_wcs, rect_imcat):
w1 = copy.deepcopy(rect_imcat)
w2 = copy.deepcopy(rect_imcat)
g = WCSGroupCatalog([w1, w2])
# catalogs with name set to None:
names = []
for im in g:
names.append(im.name)
im._name = None
assert len(g.create_group_catalog()) == 2 * len(rect_imcat.catalog)
for im, name in zip(g, names):
im.name = name
# Mixed catalogs: one has weights and another does not:
g[0].catalog.add_column(Column(np.ones(5)), name='weight')
with pytest.raises(KeyError) as e:
g.create_group_catalog()
assert False
assert (e.value.args[0] == "Non-empty catalogs in a group must all "
"either have or not have 'weight' column.")
g[0].catalog.remove_column('weight')
# artificially set catalog of one of the images to an empty table:
g[0].catalog.remove_rows(slice(None, None))
assert len(g.create_group_catalog()) == len(rect_imcat.catalog)
# artificially set all catalogs to empty table:
for im in g:
im.catalog.remove_rows(slice(None, None))
assert not g.create_group_catalog()
# artificially set all catalogs to empty table:
for im in g:
im._name = None
assert not g.create_group_catalog()
def test_wcsgroupcat_init(mock_fits_wcs, rect_imcat):
g = WCSGroupCatalog(rect_imcat, 'name1')
assert g.name == 'name1'
for im in g:
assert im.name == 'Unknown'
g.name = 'name2'
assert g.name == 'name2'
assert g[0] is rect_imcat
assert len(g) == 1
# input list is empty:
with pytest.raises(ValueError) as e:
WCSGroupCatalog([])
assert e.value.args[0] == "List of images cannot be empty."
# wrong type for the WCSImageCatalog in a list
with pytest.raises(TypeError) as e:
WCSGroupCatalog([1])
assert (e.value.args[0] == "Each element of the 'images' parameter "
"must be an 'WCSImageCatalog' object.")
# wrong type for the input catalog: it is not a WCSImageCatalog
with pytest.raises(TypeError) as e:
WCSGroupCatalog(1)
assert (e.value.args[0] == "Parameter 'images' must be either a single "
"'WCSImageCatalog' object or a list of 'WCSImageCatalog' objects")
# input WCSImageCatalog with a missing catalog:
with pytest.raises(ValueError) as e:
rect_imcat.catalog = None
WCSGroupCatalog(rect_imcat)
assert (e.value.args[0] == "Each input WCS image catalog must have a "
"valid catalog.")
# input WCSImageCatalog with a missing catalog in the input list:
with pytest.raises(ValueError) as e:
rect_imcat.catalog = None
WCSGroupCatalog([rect_imcat])
assert (e.value.args[0] == "Each input WCS image catalog must have a "
"valid catalog.")
def test_wcsgroupcat_update_bb_no_images(mock_fits_wcs, rect_imcat):
g = WCSGroupCatalog(rect_imcat)
g._images = []
g.update_bounding_polygon()
assert len(g.polygon) == 0
def test_wcsgroupcat_guarded_intersection_area(mock_fits_wcs, rect_imcat):
g = WCSGroupCatalog(rect_imcat)
assert np.allclose(g._guarded_intersection_area(g),
2.9904967391303217e-12,
atol=0.0,
rtol=5.0e-4)