lsst.meas.base.forcedPhotCcd.documentation Class Reference

Inheritance diagram for lsst.meas.base.forcedPhotCcd.documentation:

Detailed Description

detectorId = exposure.getInfo().getDetector().getId()

if externalPhotoCalibCatalog is not None:
    row = externalPhotoCalibCatalog.find(detectorId)
    if row is None:
        self.log.warning("Detector id %s not found in externalPhotoCalibCatalog; "
                         "Using original photoCalib.", detectorId)
    else:
        photoCalib = row.getPhotoCalib()
        if photoCalib is None:
            self.log.warning("Detector id %s has None for photoCalib in externalPhotoCalibCatalog; "
                             "Using original photoCalib.", detectorId)
        else:
            exposure.setPhotoCalib(photoCalib)

if externalSkyWcsCatalog is not None:
    row = externalSkyWcsCatalog.find(detectorId)
    if row is None:
        self.log.warning("Detector id %s not found in externalSkyWcsCatalog; "
                         "Using original skyWcs.", detectorId)
    else:
        skyWcs = row.getWcs()
        if skyWcs is None:
            self.log.warning("Detector id %s has None for skyWcs in externalSkyWcsCatalog; "
                             "Using original skyWcs.", detectorId)
        else:
            exposure.setWcs(skyWcs)

if finalizedPsfApCorrCatalog is not None:
    row = finalizedPsfApCorrCatalog.find(detectorId)
    if row is None:
        self.log.warning("Detector id %s not found in finalizedPsfApCorrCatalog; "
                         "Using original psf.", detectorId)
    else:
        psf = row.getPsf()
        apCorrMap = row.getApCorrMap()
        if psf is None or apCorrMap is None:
            self.log.warning("Detector id %s has None for psf/apCorrMap in "
                             "finalizedPsfApCorrCatalog; Using original psf.", detectorId)
        else:
            exposure.setPsf(psf)
            exposure.setApCorrMap(apCorrMap)

if skyCorr is not None:
    exposure.maskedImage -= skyCorr.getImage()

return exposure

def mergeAndFilterReferences(self, exposure, refCats, refWcs):

# Step 1: Determine bounds of the exposure photometry will
# be performed on.
expWcs = exposure.getWcs()
expRegion = exposure.getBBox(lsst.afw.image.PARENT)
expBBox = lsst.geom.Box2D(expRegion)
expBoxCorners = expBBox.getCorners()
expSkyCorners = [expWcs.pixelToSky(corner).getVector() for
                 corner in expBoxCorners]
expPolygon = lsst.sphgeom.ConvexPolygon(expSkyCorners)

# Step 2: Filter out reference catalog sources that are
# not contained within the exposure boundaries, or whose
# parents are not within the exposure boundaries.  Note
# that within a single input refCat, the parents always
# appear before the children.
mergedRefCat = None
for refCat in refCats:
    refCat = refCat.get()
    if mergedRefCat is None:
        mergedRefCat = lsst.afw.table.SourceCatalog(refCat.table)
    containedIds = {0}  # zero as a parent ID means "this is a parent"
    for record in refCat:
        if expPolygon.contains(record.getCoord().getVector()) and record.getParent() in containedIds:
            record.setFootprint(record.getFootprint())
            mergedRefCat.append(record)
            containedIds.add(record.getId())
if mergedRefCat is None:
    raise RuntimeError("No reference objects for forced photometry.")
mergedRefCat.sort(lsst.afw.table.SourceTable.getParentKey())
return mergedRefCat

def generateMeasCat(self, exposureDataId, exposure, refCat, refWcs, idPackerName):

exposureIdInfo = ExposureIdInfo.fromDataId(exposureDataId, idPackerName)
idFactory = exposureIdInfo.makeSourceIdFactory()

measCat = self.measurement.generateMeasCat(exposure, refCat, refWcs,
                                           idFactory=idFactory)
return measCat, exposureIdInfo.expId

def runDataRef(self, dataRef, psfCache=None):

Definition at line 663 of file forcedPhotCcd.py.

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

• python/lsst/meas/base/forcedPhotCcd.py