# Adapt obs_cfht and obs_lsstSims (and obs_base) to use a rings sky map

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#### Details

• Type: Improvement
• Status: To Do
• Resolution: Unresolved
• Fix Version/s: None
• Component/s: None
• Labels:
None
• Team:
External

#### Description

Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the MegacamMapper.py and lsstSimMapper.py have to be done.

The next step would be to move the default of the skymap type to obs_base in the cameraMapper and let each obs package override the pixel scale and possibly the number of rings.

#### Activity

Nicolas Chotard created issue -
Nicolas Chotard made changes -
Field Original Value New Value
Description Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the MegacamMapper.py and lsstSimMapper.py have to be done.

The next step would be to move the default of the skymap type to obs_base, and let each obs package override the pixel scale and possibly the number of rings.
Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the MegacamMapper.py and lsstSimMapper.py have to be done.

The next step would be to move the default of the skymap type to obs_base, and let each obs package override the pixel scale and possibly the number of rings.
Nicolas Chotard made changes -
 Description Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the MegacamMapper.py and lsstSimMapper.py have to be done.   The next step would be to move the default of the skymap type to obs_base, and let each obs package override the pixel scale and possibly the number of rings. Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the [MegacamMapper.py|https://github.com/lsst/obs_cfht/blob/master/python/lsst/obs/cfht/megacamMapper.py] and [lsstSimMapper.py|https://github.com/lsst/obs_lsstSim/blob/master/python/lsst/obs/lsstSim/lsstSimMapper.py] have to be done.   The next step would be to move the default of the skymap type to obs_base, and let each obs package override the pixel scale and possibly the number of rings.
Nicolas Chotard made changes -
 Description Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the [MegacamMapper.py|https://github.com/lsst/obs_cfht/blob/master/python/lsst/obs/cfht/megacamMapper.py] and [lsstSimMapper.py|https://github.com/lsst/obs_lsstSim/blob/master/python/lsst/obs/lsstSim/lsstSimMapper.py] have to be done.   The next step would be to move the default of the skymap type to obs_base, and let each obs package override the pixel scale and possibly the number of rings. Data processing of CFHT and (soon) simulated LSST images in the context of DC2 have the need to use an absolute sky map such as the rings sky map used in the HSC reprocessing. To do so, modifications of the [MegacamMapper.py|https://github.com/lsst/obs_cfht/blob/master/python/lsst/obs/cfht/megacamMapper.py] and [lsstSimMapper.py|https://github.com/lsst/obs_lsstSim/blob/master/python/lsst/obs/lsstSim/lsstSimMapper.py] have to be done.   The next step would be to move the default of the skymap type to obs_base in the [cameraMapper|https://github.com/lsst/obs_base/blob/master/python/lsst/obs/base/cameraMapper.py] and let each obs package override the pixel scale and possibly the number of rings.
Jim Bosch made changes -
 Link This issue is triggered by RFC-438 [ RFC-438 ]
John Swinbank made changes -
 Team External [ 12117 ]
Tim Jenness made changes -
 Remote Link This issue links to "Page (Confluence)" [ 31070 ]

#### People

Assignee:
Nicolas Chotard
Reporter:
Nicolas Chotard
Reviewers:
Jim Bosch
Watchers:
Jim Bosch, Nicolas Chotard, Tim Jenness