Calculating and Recording Coordinate Metadata on
OPO Newscenter Press Release Astronomical Images:
Project Overview, Status Report and Recommendations for Migration
Lisa Frattare on behalf of Tony Rogers and Jessica Kenney
Presented 12/4/2014
{hst_pr_sia_opo_all_hands_2006_12_06.ppt}
CHAI: Coordinates for Hubble Astronomical ImagesCAPRI: Coordinates for Astronomical Press Release Images
AVM: Astronomy Visualization MetadataVAMP: Virtual Astronomy Multimedia Project
NVO/VO: National Virtual ObservatorySIAP: Simple Image Access Protocol
ACRONYMS
Press release images are made from FITS telescope data
FITS files include World Coordinate System (WCS)i.e. where on the sky the telescope was pointed
Image Pixels Image Header
Coordinate Informationis lost in Press Release Images
due to rotation, cropping, resizing
Software to Measure WCS: Pinpoint*
Target Image: Press release TIFF
Reference Image: FITS data (WCS)
* wcs.py << IRAF kiss.kastrom 1995 LMF
Resultant Image: TIFF image with coordinate info embedded in header
Artwork
Composite
Print layout
Moving Targets
Non-coordinate Image Types
“Must be astronomical from edge-to-edge.”
Astronomical only- these are considered “able”
Astronomical w/ notation “compass” files
Further Limiting of the Sample
Virtual Observatories
-> VAMP (JPL/Spitzer) -> AVM
Digital data, digital connections, digital processing
Many telescopes, many repositories, many bandpasses
Define standards
Build infrastructure & tools
Not best suited for Hubble Data
• Many of these collections are now obsolete• Need to (re)think permanence, archival, long-term investment
and maintenance on collection to make it available for decades
CHAI / MAST-like Projects in the Past
NASA Metadata Standard
Dublin Core Metadata Initiative (DCMI)
dc:tagname dcterms:tagname
Minor Impact:NASA naming
convention: STSCI-2014-24-e.tif
Hubblesite Migration
Objective: To efficiently tag and deliver press release images on-the-fly
Main Task: Create an EASY mechanism/tool to update Hubblesite image with repeated changes to title/credit/caption/factsand push live (admin of Hubblesite)
Secondary Task: To increase ability for anyone to tag or make changes to current tags with minimal effort. Current scheme is expert-friendly only. Impact to News Production: Minor at first with pre-tagged images
Delivery of pre-tagged images by Lisa & Zolt that could include: • Boilerplate: creator/publisher• Pinpoint: spatial• Distance, proposal/data info • Spectral info, categories, subject name • Proxy title, headline, caption
Current Procedure: Facts + Image Products = Hubblesite Release • Image products delivered ~1 week before. • Edits to text occur within days/hours of release.
Proposed Workflow Change: • Marry metadata to single image and make daughter products• Update header information repeatedly as necessary
Second-Phase Modifications for News: (more hands-on) Transfer Metadata from TIFS to non-astronomical images or other presentations of the same object: detail crops, full sized images, black and white, composite (UVIS/IR) i.e. caption of image “a” applied to all other images in that release
Other Migration Discussion Points:
• Writer to detach press release info from image: i.e. press release caption to generic description
• Discuss Hubblesite/NASA required metadata and where that can be auto-inserted i.e. constellation, 1st paragraph summar
• Other images to tag: Moving Target, non-Hubble
Initial discussion with: (at the very least)• Carlos (programmer)• Lacey (management/on-line outreach)• Kelly (ingest for Hubblesite)• Lisa (prepares release facts)• Tony (MAST programmer)• Jessica (AVM/MAST STPR) (later with anyone else impacted by the changes: Cheryl, Zolt, writers, etc.)
Astropix eyecandy: