Houston-Galveston Area Council 2018 Orthophoto Project Project Evaluation Review • Cornell Rowan, Project Manager • Ed Turner, VP Business Development Tim Bohn, VP Business Development •
Houston-Galveston Area Council 2018 Orthophoto Project Schedule Phase Required Actual Variance Completion Completion Date Date Imagery Acquisition 2/28/2018 1/31/2018 28 days early Image Processing 3/12/2018 2/9/2018 31 days early Aerotriangulation 3/20/2018 2/23/2018 25 days early Pilot Imagery 4/2/2018 3/29/2018 4 days early SurCheck Inspection 5/2/2018 4/27/2018 5 days early Final Ortho Delivery 6/20/2018 8/5/2018 SurCheck review determined final delivery
Houston-Galveston Area Council 2018 Orthophoto Project Quality Factors Initial Inspection/ Reflights • 22 partial lines reflown to correct image imperfections Impact of Reflights on Schedule • None – acquisition completed 28 days early Surdex Imagery Production and Inspection • Surdex found and corrected 6,420 orthoimage irregularities prior to the H-GAC SurCheck QA/QC process H-GAC Imagery Inspection • Approximately 2,000 H-GAC identified issues within the imagery. Less than 3% of identified issues were fixable
Houston-Galveston Area Council 2018 Orthophoto Project H-GAC GDW Assessment of Imagery: Any Question or Comments? • Image Clarity, Sharpness • Color Balancing • Seamlines Usability of Near Infrared •
Houston-Galveston Area Council 2018 Orthophoto Project Spatial Accuracy • 6” Orthoimagery Horizontal Accuracy – 0.327 ft at 95%CE 12” Orthoimagery Horizontal Accuracy – 0.491 ft at 95%CE • Accuracy results are validated in Compass Accuracy Analyst •
Houston-Galveston Area Council 2018 Orthophoto Project Comments or Suggestions? Communications • Surdex Flight Tracker • Project Status/Progress Reporting • • SurCheck Online Inspection Tool
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