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Eric Jackson

Eric Jackson. Digital Preservation of a Highway Photolog Film Archive in Connecticut. Bradley Overturf. (P12-5630). James Mahoney. Work Flow. CT Photolog History

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Eric Jackson

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  1. Eric Jackson Digital Preservation of a Highway Photolog Film Archive in Connecticut Bradley Overturf (P12-5630) James Mahoney Work Flow CT Photolog History ConnDOT started photologging in 1973 as a means to improve inventory data collection, which, to that point, had been acquired manually by field inspectors on foot, or in state cars logging roadway features on the fly with pencil and paper. Automated collection marked a significant step forward. In Connecticut this was accomplished through a 1973 research project supported by the Federal Highway Administration (FHWA). The mode of collection proposed and ultimately implemented was a van instrumented with a 35mm motion picture camera attached to the dashboard and distance measuring sensors on the wheels that triggered the camera to fire every 1/100th of a mile. This resulted in forward facing, driver's-eye-view images. 400-foot film rolls were developed and positive film work prints were cut and spliced into single route/directions, and catalogued by the photolog staff for distribution. In the spring of 1974 the first of three film viewing stations was set up in ConnDOT's Traffic Engineering Division Historical Preservation In an effort to preserve the 35mm film images and make them more accessible a project was established to digitize the film. Images from the 1980s were converted to a lower quality digital format and stored on laser disks in a previous effort. This project involves the creation high quality digital images. Film Cleaned and Old Splices Replaced Film Captured 1974-1996 On 35 mm Movie Quality Film Film Shipped to Facility for Transfer Scanned as 4K image and Color Corrected Uncompressed 4K Images Saved on 1TB LTO-4 Tapes for archiving Total of ~1,000 tapes LTO-4 Tapes Downloaded and Images are Color Corrected and Light Balanced and Converted to JPEGs for Distribution • Project Details • 35 mm movie quality film • 1974 to 1996 • 441 Reels • Each real ~1600 feet • Approximately 12,000,000 images • 35mm to 4K digital image I-84 RT 15 RT 169 1985 Laser Disk 35mm 1985 4K 35mm Images Available to Users Via Digital HIWay Funding for this project provided by the Federal Highway Administration under SPR-2260. 2010 HD Digital

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