def testMockCalibrateTask(self):
task = MockCalibrateTask()
pipelineTests.assertValidInitOutput(task)
# Even the real CalibrateTask won't pass assertValidOutput, because for
# some reason the outputs are injected in runQuantum rather than run.
self.butler.put(afwImage.ExposureF(), "icExp", self.visitId)
self.butler.put(afwMath.BackgroundList(), "icExpBackground",
self.visitId)
self.butler.put(afwTable.SourceCatalog(), "icSrc", self.visitId)
self.butler.put(afwTable.SimpleCatalog(), "gaia_dr2_20200414",
self.htmId)
self.butler.put(afwTable.SimpleCatalog(), "ps1_pv3_3pi_20170110",
self.htmId)
quantum = pipelineTests.makeQuantum(
task, self.butler, self.visitId, {
"exposure": self.visitId,
"background": self.visitId,
"icSourceCat": self.visitId,
"astromRefCat": [self.htmId],
"photoRefCat": [self.htmId],
"outputExposure": self.visitId,
"outputCat": self.visitId,
"outputBackground": self.visitId,
"matches": self.visitId,
"matchesDenormalized": self.visitId,
})
pipelineTests.runTestQuantum(task, self.butler, quantum, mockRun=False)
def readAlexieMASKED_reg(fileName="/Users/rhl/Dropbox/Robert/MASKED.reg"):
"""Read Alexie's COSMOS table, converting it to a minimal form that can be used with afwTable.matchRaDec"""
with open(fileName, "r") as fd:
while True:
line = fd.readline()
if not line:
break
mat = re.search(r"fk5;circle\(\s*(\d+\.\d+),\s*(\d+\.\d+)\s*,\s*(\d+\.\d+)\"\)# color=\w+\s*$", line)
if mat:
ra, dec, rad = [float(_) for _ in mat.groups()]
print ra, dec, rad
return
schema = afwTable.SimpleTable.makeMinimalSchema()
schema.addField(afwTable.Field["I"]("mu_class", "S/G classification. 1: galaxy; 2: star; 3: other"))
schema.addField(afwTable.Field["F"]("mag_auto", "SExtractor's mag_auto"))
cat = afwTable.SimpleCatalog(schema)
n = len(data)
# There has to be a better way! https://jira.lsstcorp.org/browse/DM-347
cat.reserve(n)
for i in range(n):
cat.addNew()
cat["id"][:] = data["IDENT"]
cat["coord.ra"][:] = data["ALPHA_J2000"]
cat["coord.dec"][:] = data["DELTA_J2000"]
cat["mu_class"][:] = data["MU_CLASS"]
cat["mag_auto"][:] = data["MAG_AUTO"]
cat.writeFits("cosmos_sg.fits")
def readAlexieFITS(fileName="/Users/rhl/Dropbox/Robert/cosmos_forhsc_feb20_2012.fits"):
"""Read Alexie's COSMOS table, converting it to a minimal form that can be used with afwTable.matchRaDec"""
import pyfits
tbl = pyfits.open(fileName)
data = tbl[1].data
schema = afwTable.SimpleTable.makeMinimalSchema()
schema.addField(afwTable.Field["I"]("mu_class", "S/G classification. 1: galaxy; 2: star; 3: other"))
schema.addField(afwTable.Field["F"]("mag_auto", "SExtractor's mag_auto"))
cat = afwTable.SimpleCatalog(schema)
n = len(data)
# There has to be a better way! https://jira.lsstcorp.org/browse/DM-347
cat.reserve(n)
for i in range(n):
cat.addNew()
cat["id"][:] = data["IDENT"]
cat["coord.ra"][:] = data["ALPHA_J2000"]
cat["coord.dec"][:] = data["DELTA_J2000"]
cat["mu_class"][:] = data["MU_CLASS"]
cat["mag_auto"][:] = data["MAG_AUTO"]
cat.writeFits("cosmos_sg.fits")
def loadData(self, rangePix=3000, numPoints=25):
"""Load catalogs and make the match list
This is a separate function so data can be reloaded if fitting more than once
(each time a WCS is fit it may update the source catalog, reference catalog and match list)
"""
refSchema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=["r"], addIsPhotometric=True, addCentroid=True)
self.refCat = afwTable.SimpleCatalog(refSchema)
srcSchema = afwTable.SourceTable.makeMinimalSchema()
SingleFrameMeasurementTask(schema=srcSchema)
self.srcCoordKey = afwTable.CoordKey(srcSchema["coord"])
self.srcCentroidKey = afwTable.Point2DKey(srcSchema["slot_Centroid"])
self.srcCentroidKey_xErr = srcSchema["slot_Centroid_xErr"].asKey()
self.srcCentroidKey_yErr = srcSchema["slot_Centroid_yErr"].asKey()
self.sourceCat = afwTable.SourceCatalog(srcSchema)
self.matches = []
for i in np.linspace(0., rangePix, numPoints):
for j in np.linspace(0., rangePix, numPoints):
src = self.sourceCat.addNew()
refObj = self.refCat.addNew()
src.set(self.srcCentroidKey, lsst.geom.Point2D(i, j))
src.set(self.srcCentroidKey_xErr, 0.1)
src.set(self.srcCentroidKey_yErr, 0.1)
c = self.tanWcs.pixelToSky(i, j)
refObj.setCoord(c)
self.matches.append(self.MatchClass(refObj, src, 0.0))
def _outputStandardStars(self, butler, offsets):
"""
Output standard stars in indexed reference catalog format.
Parameters
----------
butler: `lsst.daf.persistence.Butler`
offsets: `np.array` of floats
Per band zeropoint offsets
"""
self.log.info("Outputting standard stars to %s" %
(self.config.datasetConfig.ref_dataset_name))
# Load the stars (this is the full set of stars, no cuts)
stars = butler.get('fgcmStandardStars', fgcmcycle=self.useCycle)
# We determine the conversion from the native units (typically radians) to
# degrees for the first star. This allows us to treat coord_ra/coord_dec as
# numpy arrays rather than Angles, which would we approximately 600x slower.
# TODO: Fix this after DM-16524 (HtmIndexer.indexPoints should take coords
# (as Angles) for input
conv = stars[0]['coord_ra'].asDegrees() / float(stars[0]['coord_ra'])
indices = np.array(
self.indexer.indexPoints(stars['coord_ra'] * conv,
stars['coord_dec'] * conv))
formattedCat = self._formatCatalog(stars, offsets)
# Write the master schema
dataId = self.indexer.makeDataId(
'master_schema', self.config.datasetConfig.ref_dataset_name)
butler.put(afwTable.SimpleCatalog(formattedCat.schema),
'ref_cat',
dataId=dataId)
# Break up the pixels using a histogram
h, rev = esutil.stat.histogram(indices, rev=True)
gd, = np.where(h > 0)
selected = np.zeros(len(formattedCat), dtype=np.bool)
for i in gd:
i1a = rev[rev[i]:rev[i + 1]]
# the formattedCat afwTable can only be indexed with boolean arrays,
# and not numpy index arrays (see DM-16497). This little trick
# converts the index array into a boolean array
selected[:] = False
selected[i1a] = True
# Write the individual pixel
dataId = self.indexer.makeDataId(
indices[i1a[0]], self.config.datasetConfig.ref_dataset_name)
butler.put(formattedCat[selected], 'ref_cat', dataId=dataId)
# And save the dataset configuration
dataId = self.indexer.makeDataId(
None, self.config.datasetConfig.ref_dataset_name)
butler.put(self.config.datasetConfig, 'ref_cat_config', dataId=dataId)
self.log.info("Done outputting standard stars.")
def setUp(self):
self.crval = afwCoord.IcrsCoord(afwGeom.PointD(44., 45.))
self.crpix = afwGeom.Point2D(15000, 4000)
arcsecPerPixel = 1 / 3600.0
CD11 = arcsecPerPixel
CD12 = 0
CD21 = 0
CD22 = arcsecPerPixel
self.wcs = afwImage.makeWcs(self.crval, self.crpix, CD11, CD12, CD21,
CD22)
refSchema = afwTable.SimpleTable.makeMinimalSchema()
self.refCentroidKey = afwTable.Point2DKey.addFields(
refSchema, "centroid", "centroid", "pixels")
self.refCoordKey = afwTable.CoordKey(refSchema["coord"])
self.refCat = afwTable.SimpleCatalog(refSchema)
# an alias is required to make src.getCentroid() work;
# simply defining a field named "slot_Centroid" doesn't suffice
srcSchema = afwTable.SourceTable.makeMinimalSchema()
self.srcCentroidKey = afwTable.Point2DKey.addFields(
srcSchema, "base_SdssCentroid", "centroid", "pixels")
srcAliases = srcSchema.getAliasMap()
srcAliases.set("slot_Centroid", "base_SdssCentroid")
self.srcCoordKey = afwTable.CoordKey(srcSchema["coord"])
self.sourceCat = afwTable.SourceCatalog(srcSchema)
def loadAndMatch(self, exposure, sourceCat):
"""!Fake loading and matching
Copy the source catalog to a reference catalog and producing a match list
"""
wcs = exposure.getWcs()
refSchema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=[FilterName],
addIsPhotometric=True,
)
refCat = afwTable.SimpleCatalog(refSchema)
refFluxKey = refSchema[FilterName + "_flux"].asKey()
refIsPhotoKey = refSchema["photometric"].asKey()
matches = lsst.afw.table.ReferenceMatchVector()
for src in sourceCat:
flux = 1e-3 * src.getPsfFlux() * np.random.normal(1.0, 2e-2)
refObj = refCat.addNew()
refObj.set(refFluxKey, flux)
refObj.setCoord(wcs.pixelToSky(src.getCentroid()))
refObj.set(refIsPhotoKey, True)
match = lsst.afw.table.ReferenceMatch(refObj, src, 0)
matches.append(match)
return pipeBase.Struct(
refCat=refCat,
matches=matches,
matchMeta=createMatchMetadata(exposure),
)
def makeRefCatalog(self):
schema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=["g", "r"],
addIsPhotometric=True,
addIsResolved=True)
catalog = afwTable.SimpleCatalog(schema)
return catalog
def _filterRefCat(self, refCat, refFluxField):
"""Sub-select a number of reference objects starting from the brightest
and maxing out at the number specified by maxRefObjects in the config.
No trimming is done if len(refCat) > config.maxRefObjects.
Parameters
----------
refCat : `lsst.afw.table.SimpleCatalog`
Catalog of reference objects to trim.
refFluxField : `str`
field of refCat to use for flux
Returns
-------
outCat : `lsst.afw.table.SimpleCatalog`
Catalog trimmed to the number set in the task config from the
brightest flux down.
"""
# Find the flux cut that gives us the desired number of objects.
if len(refCat) <= self.config.maxRefObjects:
return refCat
fluxArray = refCat.get(refFluxField)
sortedFluxArray = fluxArray[fluxArray.argsort()]
minFlux = sortedFluxArray[-(self.config.maxRefObjects + 1)]
selected = (refCat.get(refFluxField) > minFlux)
outCat = afwTable.SimpleCatalog(refCat.schema)
outCat.reserve(self.config.maxRefObjects)
outCat.extend(refCat[selected])
return outCat
def getCatalog(self, pixelId, schema, nNewElements):
"""Get a catalog from disk or create it if it doesn't exist.
Parameters
----------
pixelId : `dict`
Identifier for catalog to retrieve
schema : `lsst.afw.table.Schema`
Schema to use in catalog creation it does not exist.
nNewElements : `int`
The number of new elements that will be added to the catalog,
so space can be preallocated.
Returns
-------
catalog : `lsst.afw.table.SimpleCatalog`
The new or read-and-resized catalog specified by `dataId`.
"""
# This is safe, because we lock on this file before getCatalog is called.
if os.path.isfile(self.filenames[pixelId]):
catalog = afwTable.SimpleCatalog.readFits(self.filenames[pixelId])
catalog.resize(len(catalog) + nNewElements)
return catalog.copy(
deep=True
) # ensure contiguity, so that column-assignment works
catalog = afwTable.SimpleCatalog(schema)
catalog.resize(nNewElements)
self.addRefCatMetadata(catalog)
return catalog
def setUp(self):
self.crval = afwGeom.SpherePoint(44.0, 45.0, afwGeom.degrees)
self.crpix = afwGeom.Point2D(15000, 4000)
arcsecPerPixel = 1 / 3600.0
cdMatrix = afwGeom.makeCdMatrix(arcsecPerPixel * afwGeom.arcseconds)
self.wcs = afwGeom.makeSkyWcs(crval=self.crval,
crpix=self.crpix,
cdMatrix=cdMatrix)
refSchema = afwTable.SimpleTable.makeMinimalSchema()
self.refCentroidKey = afwTable.Point2DKey.addFields(
refSchema, "centroid", "centroid", "pixels")
self.refCoordKey = afwTable.CoordKey(refSchema["coord"])
self.refHasCentroidKey = refSchema.addField("hasCentroid", type="Flag")
self.refCat = afwTable.SimpleCatalog(refSchema)
# an alias is required to make src.getCentroid() work;
# simply defining a field named "slot_Centroid" doesn't suffice
srcSchema = afwTable.SourceTable.makeMinimalSchema()
self.srcCentroidKey = afwTable.Point2DKey.addFields(
srcSchema, "base_SdssCentroid", "centroid", "pixels")
srcAliases = srcSchema.getAliasMap()
srcAliases.set("slot_Centroid", "base_SdssCentroid")
self.srcCoordKey = afwTable.CoordKey(srcSchema["coord"])
self.sourceCat = afwTable.SourceCatalog(srcSchema)
def testFilterAliasMap(self):
"""Make a schema with filter aliases."""
for defaultFilter in ("", "r", "camr"):
for filterMap in ({}, {"camr": "r"}):
config = TrivialLoader.ConfigClass()
config.defaultFilter = defaultFilter
config.filterMap = filterMap
loader = TrivialLoader(config=config)
refSchema = TrivialLoader.makeMinimalSchema(filterNameList="r")
try:
loader._addFluxAliases(refSchema)
self.assertNotEqual(defaultFilter, "camr")
except Exception:
# only reference filters are allowed as default filters
self.assertEqual(defaultFilter, "camr")
continue
self.assertIn("r_flux", refSchema)
self.assertIn("r_fluxErr", refSchema)
# camera filters aliases are named <filter>_camFlux
if "camr" in filterMap:
self.assertEqual(getRefFluxField(refSchema, "camr"),
"camr_camFlux")
else:
with self.assertRaises(RuntimeError):
getRefFluxField(refSchema, "camr")
# if a non-empty default filter is specified then camFlux
# and camFluxErr should be present
hasDefault = bool(defaultFilter)
self.assertEqual("camFlux" in refSchema, hasDefault)
self.assertEqual("camFluxErr" in refSchema, hasDefault)
refCat = afwTable.SimpleCatalog(refSchema)
refObj = refCat.addNew()
refObj["r_flux"] = 1.23
self.assertAlmostEqual(
refCat[0].get(getRefFluxField(refSchema, "r")), 1.23)
if "camr" in filterMap:
self.assertAlmostEqual(
refCat[0].get(getRefFluxField(refSchema, "camr")),
1.23)
if hasDefault:
self.assertEqual(getRefFluxField(refSchema, ""), "camFlux")
self.assertAlmostEqual(
refCat[0].get(getRefFluxField(refSchema, "")), 1.23)
refObj["r_fluxErr"] = 0.111
if "camr" in filterMap:
self.assertEqual(refCat[0].get("camr_camFluxErr"), 0.111)
fluxKey, fluxErrKey = getRefFluxKeys(refSchema, "r")
self.assertEqual(refCat[0].get(fluxKey), 1.23)
self.assertEqual(refCat[0].get(fluxErrKey), 0.111)
if "camr" in filterMap:
fluxKey, fluxErrKey = getRefFluxKeys(refSchema, "camr")
self.assertEqual(refCat[0].get(fluxErrKey), 0.111)
else:
with self.assertRaises(RuntimeError):
getRefFluxKeys(refSchema, "camr")
def testTicket2080(self):
packed = afwTable.packMatches(self.matches)
cat1 = self.cat1.copy()
cat2 = afwTable.SimpleCatalog(self.schema)
cat1.sort()
cat2.sort()
# just test that the next line doesn't segv
afwTable.unpackMatches(packed, cat1, cat2)
def _formatCatalog(self, fgcmStarCat, offsets, bands):
"""
Turn an FGCM-formatted star catalog, applying zeropoint offsets.
Parameters
----------
fgcmStarCat : `lsst.afw.Table.SimpleCatalog`
SimpleCatalog as output by fgcmcal
offsets : `list` with len(self.bands) entries
Zeropoint offsets to apply
bands : `list` [`str`]
List of band names from FGCM output
Returns
-------
formattedCat: `lsst.afw.table.SimpleCatalog`
SimpleCatalog suitable for using as a reference catalog
"""
sourceMapper = afwTable.SchemaMapper(fgcmStarCat.schema)
minSchema = LoadIndexedReferenceObjectsTask.makeMinimalSchema(
bands, addCentroid=False, addIsResolved=True, coordErrDim=0)
sourceMapper.addMinimalSchema(minSchema)
for band in bands:
sourceMapper.editOutputSchema().addField('%s_nGood' % (band),
type=np.int32)
sourceMapper.editOutputSchema().addField('%s_nTotal' % (band),
type=np.int32)
sourceMapper.editOutputSchema().addField('%s_nPsfCandidate' %
(band),
type=np.int32)
formattedCat = afwTable.SimpleCatalog(sourceMapper.getOutputSchema())
formattedCat.reserve(len(fgcmStarCat))
formattedCat.extend(fgcmStarCat, mapper=sourceMapper)
# Note that we don't have to set `resolved` because the default is False
for b, band in enumerate(bands):
mag = fgcmStarCat['mag_std_noabs'][:, b].astype(
np.float64) + offsets[b]
# We want fluxes in nJy from calibrated AB magnitudes
# (after applying offset). Updated after RFC-549 and RFC-575.
flux = (mag * units.ABmag).to_value(units.nJy)
fluxErr = (np.log(10.) /
2.5) * flux * fgcmStarCat['magErr_std'][:, b].astype(
np.float64)
formattedCat['%s_flux' % (band)][:] = flux
formattedCat['%s_fluxErr' % (band)][:] = fluxErr
formattedCat['%s_nGood' % (band)][:] = fgcmStarCat['ngood'][:, b]
formattedCat['%s_nTotal' % (band)][:] = fgcmStarCat['ntotal'][:, b]
formattedCat['%s_nPsfCandidate' %
(band)][:] = fgcmStarCat['npsfcand'][:, b]
addRefCatMetadata(formattedCat)
return formattedCat
def make_catalog():
schema = LoadReferenceObjectsTask.makeMinimalSchema(['r', 'z'])
schema.addField('bad_flux', doc='old flux units', type=float, units='')
schema.addField('bad_fluxErr', doc='old flux units', type=float, units='Jy')
refCat = afwTable.SimpleCatalog(schema)
refObj = refCat.addNew()
refObj["bad_flux"] = flux
refObj["bad_fluxErr"] = fluxErr
return refCat
def __init__(self):
schema = afwTable.SimpleTable.makeMinimalSchema()
schema.addField("radius", "Angle", "radius of mask")
self._catalog = afwTable.SimpleCatalog(schema)
self._catalog.table.setMetadata(dafBase.PropertyList())
self.table = self._catalog.table
self.addNew = self._catalog.addNew
def _outputStandardStars(self, butler, offsets):
"""
Output standard stars in indexed reference catalog format.
Parameters
----------
butler: lsst.daf.persistence.Butler
offsets: np.array of floats
Per band zeropoint offsets
"""
self.log.info("Outputting standard stars to %s" %
(self.config.datasetConfig.ref_dataset_name))
# Load the stars (this is the full set of stars, no cuts)
stars = butler.get('fgcmStandardStars', fgcmcycle=self.useCycle)
# We assume these are returned in radians, because the units interface
# required a loop over a giant catalog.
# TODO: figure out check of native units
indices = np.array(
self.indexer.indexPoints(np.degrees(stars['coord_ra']),
np.degrees(stars['coord_dec'])))
formattedCat = self._formatCatalog(stars, offsets)
# Write the master schema
dataId = self.indexer.makeDataId(
'master_schema', self.config.datasetConfig.ref_dataset_name)
butler.put(afwTable.SimpleCatalog(formattedCat.schema),
'ref_cat',
dataId=dataId)
# Break up the pixels using a histogram
h, rev = esutil.stat.histogram(indices, rev=True)
gd, = np.where(h > 0)
selected = np.zeros(len(formattedCat), dtype=np.bool)
for i in gd:
i1a = rev[rev[i]:rev[i + 1]]
# Turn into a boolean array
selected[:] = False
selected[i1a] = True
# Write the individual pixel
dataId = self.indexer.makeDataId(
indices[i1a[0]], self.config.datasetConfig.ref_dataset_name)
butler.put(formattedCat[selected], 'ref_cat', dataId=dataId)
# And save the dataset configuration
dataId = self.indexer.makeDataId(
None, self.config.datasetConfig.ref_dataset_name)
butler.put(self.config.datasetConfig, 'ref_cat_config', dataId=dataId)
self.log.info("Done outputting standard stars.")
def makeDataHorizontal(self):
"""Make minimal sythetic catalog with simple values."""
ra_test = np.linspace(np.radians(-10.), np.radians(10.), 101)
dec_test = np.tile(0., 101)
schema = afwTable.SourceTable.makeMinimalSchema()
cat = afwTable.SimpleCatalog(schema)
cat.resize(len(ra_test))
cat = cat.copy(deep=True)
cat['coord_ra'][:] = ra_test
cat['coord_dec'][:] = dec_test
return cat
def loadSkyCircle(self, ctrCoord, radius, filterName=None):
"""!Load reference objects that overlap a circular sky region
@param[in] ctrCoord center of search region (an lsst.afw.geom.Coord)
@param[in] radius radius of search region (an lsst.afw.geom.Angle)
@param[in] filterName name of filter, or None for the default filter;
used for flux values in case we have flux limits (which are not yet implemented)
@return an lsst.pipe.base.Struct containing:
- refCat a catalog of reference objects with the
\link meas_algorithms_loadReferenceObjects_Schema standard schema \endlink
as documented in LoadReferenceObjects, including photometric, resolved and variable;
hasCentroid is False for all objects.
- fluxField = name of flux field for specified filterName. None if refCat is None.
"""
id_list, boundary_mask = self.indexer.get_pixel_ids(ctrCoord, radius)
shards = self.get_shards(id_list)
refCat = self.butler.get('ref_cat',
dataId=self.indexer.make_data_id(
'master_schema', self.ref_dataset_name),
immediate=True)
self._addFluxAliases(refCat.schema)
fluxField = getRefFluxField(schema=refCat.schema,
filterName=filterName)
for shard, is_on_boundary in zip(shards, boundary_mask):
if shard is None:
continue
if is_on_boundary:
refCat.extend(self._trim_to_circle(shard, ctrCoord, radius))
else:
refCat.extend(shard)
# make sure catalog is contiguous
if not refCat.isContiguous():
refCat = refCat.copy()
# add and initialize centroid and hasCentroid fields (these are added
# after loading to avoid wasting space in the saved catalogs)
# the new fields are automatically initialized to (nan, nan) and False
# so no need to set them explicitly
mapper = afwTable.SchemaMapper(refCat.schema, True)
mapper.addMinimalSchema(refCat.schema, True)
mapper.editOutputSchema().addField("centroid_x", type=float)
mapper.editOutputSchema().addField("centroid_y", type=float)
mapper.editOutputSchema().addField("hasCentroid", type="Flag")
expandedCat = afwTable.SimpleCatalog(mapper.getOutputSchema())
expandedCat.extend(refCat, mapper=mapper)
del refCat # avoid accidentally returning the unexpanded reference catalog
# return reference catalog
return pipeBase.Struct(
refCat=expandedCat,
fluxField=fluxField,
)
def setUp(self):
self.size = 10
self.numMatches = self.size//2
self.schema = afwTable.SimpleTable.makeMinimalSchema()
self.cat1 = afwTable.SimpleCatalog(self.schema)
self.cat2 = afwTable.SimpleCatalog(self.schema)
for i in range(self.size):
record1 = self.cat1.table.makeRecord()
record2 = self.cat2.table.makeRecord()
record1.setId(i + 1)
record2.setId(self.size - i)
self.cat1.append(record1)
self.cat2.append(record2)
self.matches = []
for i in range(self.numMatches):
index = 2*i
match = afwTable.SimpleMatch(
self.cat1[index], self.cat2[self.size - index - 1], index)
if Debug:
print("Inject:", match.first.getId(), match.second.getId())
self.matches.append(match)
def loadSkyCircle(self, ctrCoord, radius, filterName=None, epoch=None):
shardIdList, isOnBoundaryList = self.indexer.getShardIds(
ctrCoord, radius)
shards = self.getShards(shardIdList)
refCat = self.butler.get('ref_cat',
dataId=self.indexer.makeDataId(
'master_schema', self.ref_dataset_name),
immediate=True)
self._addFluxAliases(refCat.schema)
fluxField = getRefFluxField(schema=refCat.schema,
filterName=filterName)
for shard, isOnBoundary in zip(shards, isOnBoundaryList):
if shard is None:
continue
if isOnBoundary:
refCat.extend(self._trimToCircle(shard, ctrCoord, radius))
else:
refCat.extend(shard)
if epoch is not None and "pm_ra" in refCat.schema:
# check for a catalog in a non-standard format
if isinstance(refCat.schema["pm_ra"].asKey(),
lsst.afw.table.KeyAngle):
self.applyProperMotions(refCat, epoch)
else:
self.log.warn(
"Catalog pm_ra field is not an Angle; not applying proper motion"
)
# add and initialize centroid and hasCentroid fields (these are
# added after loading to avoid wasting space in the saved catalogs)
# the new fields are automatically initialized to (nan, nan) and
# False so no need to set them explicitly
mapper = afwTable.SchemaMapper(refCat.schema, True)
mapper.addMinimalSchema(refCat.schema, True)
mapper.editOutputSchema().addField("centroid_x", type=float)
mapper.editOutputSchema().addField("centroid_y", type=float)
mapper.editOutputSchema().addField("hasCentroid", type="Flag")
expandedCat = afwTable.SimpleCatalog(mapper.getOutputSchema())
expandedCat.extend(refCat, mapper=mapper)
del refCat # avoid accidentally returning the unexpanded ref cat
# make sure catalog is contiguous
if not expandedCat.isContiguous():
expandedCat = expandedCat.copy(True)
# return reference catalog
return pipeBase.Struct(
refCat=expandedCat,
fluxField=fluxField,
)
def __init__(self):
schema = afwTable.SimpleTable.makeMinimalSchema()
schema.addField("type", str, "type of region (e.g. box, circle)", size=10)
schema.addField("radius", "Angle", "radius of mask (if type == circle")
schema.addField("height", "Angle", "height of mask (if type == box)")
schema.addField("width", "Angle", "width of mask (if type == box)")
schema.addField("angle", "Angle", "rotation of mask (if type == box)")
schema.addField("mag", float, "object's magnitude")
self._catalog = afwTable.SimpleCatalog(schema)
self._catalog.table.setMetadata(dafBase.PropertyList())
self.table = self._catalog.table
self.addNew = self._catalog.addNew
def _saveMasterSchema(self, filename):
"""Generate and save the master catalog schema.
Parameters
----------
filename : `str`
An input file to read to get the input dtype.
"""
arr = self.file_reader.run(filename)
schema, key_map = self.makeSchema(arr.dtype)
catalog = afwTable.SimpleCatalog(schema)
addRefCatMetadata(catalog)
self._writeMasterSchema(catalog)
return schema, key_map
def computePosRefCatalog(self, sourceCat):
"""Generate a position reference catalog from a source catalog
"""
minimalPosRefSchema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=["r"], addCentroid=True)
refCat = afwTable.SimpleCatalog(minimalPosRefSchema)
for source in sourceCat:
refObj = refCat.addNew()
refObj.setCoord(source.getCoord())
refObj.set("centroid_x", source.getX())
refObj.set("centroid_y", source.getY())
refObj.set("hasCentroid", True)
refObj.set("r_flux", source.get("slot_ApFlux_instFlux"))
refObj.set("r_fluxErr", source.get("slot_ApFlux_instFluxErr"))
refObj.setId(source.getId())
return refCat
def testFilterAliasMap(self):
"""Make a schema with filter aliases."""
for filterMap in ({}, {"camr": "r"}):
config = TrivialLoader.ConfigClass()
config.filterMap = filterMap
loader = TrivialLoader(config=config)
refSchema = TrivialLoader.makeMinimalSchema(filterNameList="r")
loader._addFluxAliases(
refSchema,
anyFilterMapsToThis=config.anyFilterMapsToThis,
filterMap=config.filterMap)
self.assertIn("r_flux", refSchema)
self.assertIn("r_fluxErr", refSchema)
# camera filters aliases are named <filter>_camFlux
if "camr" in filterMap:
self.assertEqual(getRefFluxField(refSchema, "camr"),
"camr_camFlux")
else:
with self.assertRaisesRegex(
RuntimeError,
r"Could not find flux field\(s\) camr_camFlux, camr_flux"
):
getRefFluxField(refSchema, "camr")
refCat = afwTable.SimpleCatalog(refSchema)
refObj = refCat.addNew()
refObj["r_flux"] = 1.23
self.assertAlmostEqual(
refCat[0].get(getRefFluxField(refSchema, "r")), 1.23)
if "camr" in filterMap:
self.assertAlmostEqual(
refCat[0].get(getRefFluxField(refSchema, "camr")), 1.23)
refObj["r_fluxErr"] = 0.111
if "camr" in filterMap:
self.assertEqual(refCat[0].get("camr_camFluxErr"), 0.111)
fluxKey, fluxErrKey = getRefFluxKeys(refSchema, "r")
self.assertEqual(refCat[0].get(fluxKey), 1.23)
self.assertEqual(refCat[0].get(fluxErrKey), 0.111)
if "camr" in filterMap:
fluxKey, fluxErrKey = getRefFluxKeys(refSchema, "camr")
self.assertEqual(refCat[0].get(fluxErrKey), 0.111)
else:
with self.assertRaises(RuntimeError):
getRefFluxKeys(refSchema, "camr")
def setUp(self):
crval = IcrsCoord(afwGeom.PointD(44., 45.))
crpix = afwGeom.PointD(0, 0)
arcsecPerPixel = 1 / 3600.0
CD11 = arcsecPerPixel
CD12 = 0
CD21 = 0
CD22 = arcsecPerPixel
self.tanWcs = makeWcs(crval, crpix, CD11, CD12, CD21, CD22)
S = 300
N = 5
if self.MatchClass == afwTable.ReferenceMatch:
refSchema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=["r"], addFluxSigma=True, addIsPhotometric=True)
self.refCat = afwTable.SimpleCatalog(refSchema)
elif self.MatchClass == afwTable.SourceMatch:
refSchema = afwTable.SourceTable.makeMinimalSchema()
self.refCat = afwTable.SourceCatalog(refSchema)
else:
raise RuntimeError("Unsupported MatchClass=%r" %
(self.MatchClass, ))
srcSchema = afwTable.SourceTable.makeMinimalSchema()
SingleFrameMeasurementTask(schema=srcSchema)
self.refCoordKey = afwTable.CoordKey(refSchema["coord"])
self.srcCoordKey = afwTable.CoordKey(srcSchema["coord"])
self.srcCentroidKey = afwTable.Point2DKey(srcSchema["slot_Centroid"])
self.sourceCat = afwTable.SourceCatalog(srcSchema)
self.origSourceCat = afwTable.SourceCatalog(
srcSchema) # undistorted copy
self.matches = []
for i in np.linspace(0., S, N):
for j in np.linspace(0., S, N):
src = self.sourceCat.addNew()
refObj = self.refCat.addNew()
src.set(self.srcCentroidKey, afwGeom.Point2D(i, j))
c = self.tanWcs.pixelToSky(afwGeom.Point2D(i, j))
refObj.setCoord(c)
self.matches.append(self.MatchClass(refObj, src, 0.0))
def _saveMasterSchema(self, filename):
"""Generate and save the master catalog schema.
Parameters
----------
filename : `str`
An input file to read to get the input dtype.
"""
arr = self.file_reader.run(filename)
schema, key_map = self.makeSchema(arr.dtype)
dataId = self.indexer.makeDataId(
'master_schema', self.config.dataset_config.ref_dataset_name)
catalog = afwTable.SimpleCatalog(schema)
addRefCatMetadata(catalog)
self.butler.put(catalog, 'ref_cat', dataId=dataId)
return schema, key_map
def _formatCatalog(self, fgcmStarCat, offsets):
"""
Turn an FGCM-formatted star catalog, applying zeropoint offsets.
Parameters
----------
fgcmStarCat: `afwTable.SimpleCatalog`
SimpleCatalog as output by fgcmcal
offsets: `list` with len(self.bands) entries
Zeropoint offsets to apply
Returns
-------
formattedCat: `afwTable.SimpleCatalog`
SimpleCatalog suitable for using as a reference catalog
"""
sourceMapper = afwTable.SchemaMapper(fgcmStarCat.schema)
minSchema = LoadIndexedReferenceObjectsTask.makeMinimalSchema(
self.bands, addCentroid=False, addIsResolved=True, coordErrDim=0)
sourceMapper.addMinimalSchema(minSchema)
for band in self.bands:
sourceMapper.editOutputSchema().addField('%s_nGood' % (band),
type=np.int32)
formattedCat = afwTable.SimpleCatalog(sourceMapper.getOutputSchema())
formattedCat.reserve(len(fgcmStarCat))
formattedCat.extend(fgcmStarCat, mapper=sourceMapper)
# Note that we don't have to set `resolved` because the default is False
for b, band in enumerate(self.bands):
mag = fgcmStarCat['mag_std_noabs'][:, b] + offsets[b]
# We want fluxes in Jy from calibrated AB magnitudes
# (after applying offset)
# TODO: Full implementation of RFC-549 will have all reference
# catalogs in nJy instead of Jy.
flux = afwImage.fluxFromABMag(mag)
fluxErr = afwImage.fluxErrFromABMagErr(
fgcmStarCat['magErr_std'][:, b], mag)
formattedCat['%s_flux' % (band)][:] = flux
formattedCat['%s_fluxErr' % (band)][:] = fluxErr
formattedCat['%s_nGood' % (band)][:] = fgcmStarCat['ngood'][:, b]
return formattedCat
def loadData(self, rangePix=3000, numPoints=25):
"""Load catalogs and make the match list
This is a separate function so data can be reloaded if fitting more than once
(each time a WCS is fit it may update the source catalog, reference catalog and match list)
"""
if self.MatchClass == afwTable.ReferenceMatch:
refSchema = LoadReferenceObjectsTask.makeMinimalSchema(
filterNameList=["r"], addIsPhotometric=True, addCentroid=True)
self.refCat = afwTable.SimpleCatalog(refSchema)
elif self.MatchClass == afwTable.SourceMatch:
refSchema = afwTable.SourceTable.makeMinimalSchema()
self.refCat = afwTable.SourceCatalog(refSchema)
else:
raise RuntimeError("Unsupported MatchClass=%r" %
(self.MatchClass, ))
srcSchema = afwTable.SourceTable.makeMinimalSchema()
SingleFrameMeasurementTask(schema=srcSchema)
self.srcCoordKey = afwTable.CoordKey(srcSchema["coord"])
self.srcCentroidKey = afwTable.Point2DKey(srcSchema["slot_Centroid"])
self.srcCentroidKey_xErr = srcSchema["slot_Centroid_xErr"].asKey()
self.srcCentroidKey_yErr = srcSchema["slot_Centroid_yErr"].asKey()
self.sourceCat = afwTable.SourceCatalog(srcSchema)
self.matches = []
for i in np.linspace(0., rangePix, numPoints):
for j in np.linspace(0., rangePix, numPoints):
src = self.sourceCat.addNew()
refObj = self.refCat.addNew()
src.set(self.srcCentroidKey, lsst.geom.Point2D(i, j))
src.set(self.srcCentroidKey_xErr, 0.1)
src.set(self.srcCentroidKey_yErr, 0.1)
c = self.tanWcs.pixelToSky(i, j)
refObj.setCoord(c)
if False:
print(
"x,y = (%.1f, %.1f) pixels -- RA,Dec = (%.3f, %.3f) deg"
% (i, j, c.toFk5().getRa().asDegrees(),
c.toFk5().getDec().asDegrees()))
self.matches.append(self.MatchClass(refObj, src, 0.0))
def getCatalog(self, dataId, schema):
"""Get a catalog from the butler or create it if it doesn't exist.
Parameters
----------
dataId : `dict`
Identifier for catalog to retrieve
schema : `lsst.afw.table.Schema`
Schema to use in catalog creation if the butler can't get it
Returns
-------
catalog : `lsst.afw.table.SimpleCatalog`
The catalog specified by `dataId`
"""
if self.butler.datasetExists('ref_cat', dataId=dataId):
return self.butler.get('ref_cat', dataId=dataId)
return afwTable.SimpleCatalog(schema)
