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Aerial photography digitization at MAGIC Overview
 

Aerial photography digitization at MAGIC Overview

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Provides an overview of the workflows and considerations for digitizing aerial photography collections based on experience at MAGIC

Provides an overview of the workflows and considerations for digitizing aerial photography collections based on experience at MAGIC

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    Aerial photography digitization at MAGIC Overview Aerial photography digitization at MAGIC Overview Presentation Transcript

    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team DIGITIZING AERIAL IMAGERY: A 15,000 FT VIEW Presented by: Michael Howser & Jie Lin University of Connecticut Libraries MAGIC
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Outline • Equipment • Staffing • Timelines • Projects • Providing Access • Suggestions for the Future • Q & A
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Equipment - Scanning • Scanning • Flat bed scanners for aerial imagery 9” by 9” prints • Started with Microtek (model ???) which digitized nearly all of our aerial photography collections • Scanned in greyscale (for non-color prints) • Transitioned to the EPSON 1000XL
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Equipment - Photography • Photography • Overhead capture using digital SLR camera and camera stand • This method is utilized for archival materials • May provide better color replication and faster throughput when staffed by photographer • More expensive option Photo stand example from Miami University Libraries Digitization Lab (July 2013)
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Digitization Standards • Resolution • 300 DPI – used at MAGIC • 1200 DPI – images digitized by CT DEEP • Greater resolution = larger files but also enables greater detail when zoomed in and provides more information for printing • File Format • TIFF – uncompressed archival master • JPEG2000 – archival master • RAW (DNG) – option for photography captured materials • Derivatives for users • JPEG? • PDF? • Thumbnails?
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Staffing • Students • MAGIC utilized work study and student labor students to digitize materials • 10 hrs per week • Speed depends on student ability and equipment • Staff • Conduct QA/QC functions • Oversee digitization and coordinate student schedules
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Timeframe considerations • When using students productivity increases during summer and breaks, less during exams and midterms (generally) • Monotony of scanning can reduce motivation so need to revolve from scanning to other duties periodically • Aerial photos may be missing, have markings which need to be removed, or need preservation treatment before digitizing • Conduct tests to estimate time required to digitize a small batch to estimate completion timeframe
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Digitization Projects completed at MAGIC • 1951-1952 Aerial Photo collection (7 out of 8 counties coverage) • 1957 Aerial Photo collection (1 county) • 1963, 1967, 1969 (small area coverage) • 1970 Statewide • 1985-1986 Statewide • 1990 Statewide • 1995 Statewide
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team PROVIDING ACCESS
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Website • Offer users with multiple options to access aerial photo indexes • Each data derivative originates from the shapefile • A map preview option enables address searches using a Google Maps interface to locate and download individual images • Continue to expand on these offerings.
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Shapefile
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Metadata
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Spreadsheet
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team kml open with google earth
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Kml zoom in with download popup
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Whole state google map preview
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Zoom in with download popup
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Search by Address
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team FUTURE WORKFLOWS
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Changes to consider for the future Past • Scanned aerial photos and stored on CD/DVD • Scanned photos at 300 DPI • Combined air photo indexes in the 1960s into one collection • Used one flat bed scanner for all image scans Future • Scan images and deposit to our digital archive • Scan photos at 600-1200 DPI • Create separate indexes for each flight year then create interface to search • Streamline workflow by adding multiple scanners
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team Changes to consider for the future Past • Scanner was calibrated once • Scans were done in greyscale • QA/QC was done long after scans were completed • Students focused on one task (scanning) Future • Ensure equipment is FADGI 3-4 start compliant • Scan photos in full color rather than greyscale • QA/QC should be completed within 24-48 hours after scanning • Multiple tasks for students to improve output
    • University Libraries Digital Scholarship & Data Curation Team University Libraries Digital Scholarship & Data Curation Team QUESTIONS?