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  1. Data Management
  2. DM-22147

Add python-only function to ChebyshevBoundedField to approximate another BoundedField

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    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: afw
    • Labels:
      None
    • Story Points:
      2
    • Sprint:
      DRP F19-6 (Nov)
    • Team:
      Data Release Production

      Description

      At the current moment the PixelAreaBoundedField (and the PixelScaleBoundedField that it is replacing, see RFC-644) are too slow (by a couple orders of magnitude) to use in coaddition via a PhotoCalib. Jim Bosch says that this is a non-trivial fix (DM-22071).

      However, for many purposes, it is possible to use a ChebyshevBoundedField to approximate a PixelAreaBoundedField (or other BoundedField). Provided the field to approximate is smooth, preliminary tests show that (e.g.) a typical HSC WCS can be approximated at the 1e-7 level with plenty of speed, which is sufficient for use in a PhotoCalib.

      This ticket is to add a python-only approxBoundedField method to ChebyshevBoundedField. Tests will be written by approximating PixelAreaBoundedField (the primary use case) so this requires DM-22070 to be completed first.

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            Activity

            erykoff Eli Rykoff created issue -
            erykoff Eli Rykoff made changes -
            Field Original Value New Value
            Epic Link DM-21249 [ 414676 ]
            erykoff Eli Rykoff made changes -
            Link This issue is blocked by DM-22070 [ DM-22070 ]
            erykoff Eli Rykoff made changes -
            Link This issue blocks DM-20163 [ DM-20163 ]
            erykoff Eli Rykoff made changes -
            Status To Do [ 10001 ] In Progress [ 3 ]
            erykoff Eli Rykoff made changes -
            Reviewers Jim Bosch [ jbosch ]
            Status In Progress [ 3 ] In Review [ 10004 ]
            jbosch Jim Bosch made changes -
            Status In Review [ 10004 ] Reviewed [ 10101 ]
            erykoff Eli Rykoff made changes -
            Resolution Done [ 10000 ]
            Status Reviewed [ 10101 ] Done [ 10002 ]
            swinbank John Swinbank made changes -
            Epic Link DM-21249 [ 414676 ] DM-22588 [ 427655 ]

              People

              Assignee:
              erykoff Eli Rykoff
              Reporter:
              erykoff Eli Rykoff
              Reviewers:
              Jim Bosch
              Watchers:
              Eli Rykoff, Jim Bosch
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: