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Image and metadata management

Image and metadata management. Purpose of Survey Plan for systematic management of data Part of a National plan. Survey Questions. what metadata researchers were collecting, how it was collected, whether corrections were applied how these data were managed

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Image and metadata management

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  1. Image and metadata management Purpose of Survey Plan for systematic management of data Part of a National plan

  2. Survey Questions • what metadata researchers were collecting, • how it was collected, • whether corrections were applied • how these data were managed • how the images were managed/ catalogued • how the metadata were linked to the images. • Are any metadata standards adhered to

  3. Depends on system used. Typically look for a system which will provide multiple • views (wide and tele) or types (still/video) views of bottom to facilitate • interpretation of bottom features • have used analog and digital video and stills from digital video frame grabs • Video is used for aiming the still camera and to detect larger more disperse organism. • Resolution of video has not been sufficient for the objectives of the study. • Light sensitivity .02 lux. • currently working with still images video is feasible • Frame grabs used for size estimation

  4. Still Imaging Techniques • Used to collect analog • Rarely take screenshots from video • As long as end result is digital

  5. Only GMT,Lat,Lon

  6. No we do not currently have a standard format for filenaming. • Images are currently archived with project-specific directories • videodive# transect# time

  7. In development but at the moment using XP shared drive • database infrastructure and GIS accessability • access database on an SQL server • For video we use Oracle database • not applicable

  8. Video Imaging Techniques • To date most systems I have used have been tape-based. • Have no objection to working with systems which use direct to hard drive but range of system recording media does make problems for end user working on a common theme across various tools • not aware of equipment specifications • DV tape based but have recorded directly to hard drives

  9. Outland overlay of Ships Nav and GPS time • dive# transect# date time depth lat/long • Heading depth lat/long site name • time lat long • date time heading depth and text describing the dive area and number • GPS overlay • Horita video overlay lat / long is true camera position via transceiver internal date and time stamp • Sea-Trak GPS Video Screen Overlay used to overlay position date time on tape. • System dependent. We usually rely on the system provider to • give us the appropriate metadata for GPS and time overlays

  10. Roxio Easy Media Creator • custom software use MS explorer • PowerDVD (free software provided by BIO) not a good image - just for presentations • Roxio version 9 • PinnacleUse software with Sony digicam. Image quality medium.

  11. Image Management • With some systems provided by others master tapes are retained in an integrated system. For other project specific applications we are required to manage the tape library

  12. Fire safe locker at a different site than the analysis building • miniDV tape is original AVI clips created from that are the working copies. All AVI are embedded in ArcGIS projects. • video tapes to off site fire safe storage stills to hard drives and server

  13. Access database fields include species and habitat description • the ArcGIS projects are the catalog • Images are stored on a network drive • Access database • Oracle database for all video • The database that manages the metadata has the tape name and relavent metadata. • The physcal asset is stored separately on a shelf • Videos are numbered and listed in operation book & on spreadsheet

  14. With some of the systems we use for deep water research we can incorporate images into a searchable catalog. We actually don’t have anything comparable to our own URCHIN archive for diverse media • not applicable • ArcGis

  15. Metadata Management • System-depended. Need to obtain metadata from system providers • in order to properly incorporate data into main project databases • TrackLink uses dGPS digital compass and transceiver feeds all NMEA • NMEA data overlayed on video with Outland in decimal minutes • but logged with Class Event in decimal degrees • A knudsen echosounder is used to trigger the camera. • Depth/GPS is recorded through its recording capabilities.

  16. Access database • not applicable • Database • We do not maintain a still image database only frame grabs for publications/talks

  17. TrackPoint 2 • DGPS antenna set up directly above deployment block and scope kept to 0. • GLL string logged for temporal/positional data tracked with GIS and visually overlayed on • Video • high end dGPS with TrackLink transponder (towed camera) or vertical cable (drop camera) • for true camera position on video overlay • GPS trackpoint positioning to determine the start position of the underwater vehicle then • doppler velocity logger (DVL) and ring laser gyro (RLG) for positioning from this start point. • Rely principally on navigation provided by system providers eg ROPOS. • Main issue is integrating these capabilities into DFO regular navigation processing

  18. Not sure • Not that we know of • We try and use FDGC and ITIS but are not fully compliant • not applicable

  19. Conclusions • Working with digital images • Some metadata ‘on’ images but not ‘in’ • Some data base structures • Shelved tape, some catalogued • Limited use of Standards

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