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  1. LSST Verification and Validation
  2. LVV-18227

DMS-REQ-0379-V-01: Produce All-Sky HiPS Map_1


    • Type: Verification
    • Status: Not Covered
    • Priority: 1b
    • Resolution: Unresolved
    • Component/s: DM
    • Labels:
    • Requirement ID:
    • Requirement Text:

      Specification: Data Release Production shall include the production of an all-sky image map for the existing coadded image area in each filter band, and at least one pre-defined all-sky color image map, following the IVOA HiPS Recommendation.

    • Requirement Discussion:

      Discussion: The maximum resolution of the image maps is TBD; however, it would be desirable for it to be at least close to the underlying coadded image resolution, in order not to give a poor impression of the data quality.  It is possible that the highest-resolution HiPS tiles could be provided on-demand from the LSST cutout service.  It is expected that the HiPS tiles will be generated by resampling the existing coadds, not by performing an independent coaddition.  This requires work from Science Pipelines on resolving the ambiguities in overlap regions.  Whether the lower-resolution levels of the HiPS tiles will be generated by existing community tools (i.e., hipsgen) or by LSST code is also TBD.  The color map being "pre-defined" means that the choice of bands will be made by the LSST Project as part of the configuration of a Data Release.  This does not preclude the Science Platform additionally providing means for interactive generation of other colorizations from the single-band HiPS maps.
      By the terms of the HiPS Recommendation, a HiPS image map should include a corresponding MOC.  This may or may not be the same as the MOCs for the survey envisioned under DMS-REQ-0383 elsewhere in this document, depending on choices made for data selection.
      The Project should produce a technical note, during the construction era, detailing which of the optional components of the HiPS standard will be supported.
      This requirement specifically calls for making HiPS maps from the standard coadds and therefore whatever policies are used for the inclusion of Special Programs data in the standard coadds will also automatically apply here.  If there are both main-survey-depth and full-depth coadds for the deep drilling fields, then, it is a separate question as to whether HiPS maps will be generated for those fields.

    • Higher Level Requirement:

      [OSS-REQ-0391: 01 Data Product Conventions, OSS-REQ-0136: 04 Co-added Exposures]

    • Verification Method:
    • Success Criteria:


    • Percentage of Test Passing:
    • Sub-Component:




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            • Assignee:
              lguy Leanne Guy
              syndeiapseuser Syndeia PSE User
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              • Created:

                Summary Panel