Houston-Galveston Area Council 2018 Orthophoto Project Project - - PowerPoint PPT Presentation

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 Completion Date Actual Completion Date Variance

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