displayAstrometry

lsst.meas.astrom.displayAstrometry(refCat=None, sourceCat=None, distortedCentroidKey=None, bbox=None, exposure=None, matches=None, frame=1, title='', pause=True)

Show an astrometry debug image.

Parameters:
refCatlsst.afw.table.SimpleCatalog

reference object catalog; must have fields “centroid_x” an “centroid_y”

sourceCatlsst.afw.table.SourceCatalg

source catalog; must have field “slot_Centroid_x” and “slot_Centroid_y”

distortedCentroidKeylsst.afw.table.Key

key for sourceCat with field to use for distorted positions

exposurelsst.afw.image.Exposure

exposure to display

bboxlsst.geom.Box2I

bounding box of exposure; Used if the exposure is None

matcheslist of lsst.afw.table.ReferenceMatch

List of matched objects

frameint

frame number for display

titlestr

title for display

pausebool

pause for inspection of display? This is done by dropping into pdb.

Notes

  • reference objects in refCat are shown as red X

  • sources in sourceCat are shown as green +

  • distorted sources in sourceCat (position given by distortedCentroidKey) are shown as green o

  • matches are shown as a yellow circle around the source and a yellow line connecting the reference object and source

  • if both exposure and bbox are None, no image is displayed