Mapping And Serving Alaska’s First Statewide Digital Orthoimagery Base Map

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Mapping And Serving Alaska’s First Statewide Digital Orthoimagery Base Map

  1. 1. Mapping And ServingAlaska’s First StatewideDigital Ortho-ImageryBase MapPETER HICKMAN – Geographic InformationNetwork of AlaskaTONY FOLLETT – AeroMetricJuly 24, 2012 – Esri User Conference
  2. 2. Assignment: Provide satellite-based 1:24,000orthoimagery of entire state
  3. 3. Project Team
  4. 4. Project ScopeStandards Schedule Projection  Start: Aug 5, 2010  Albers Equal Area Conic Projection  Project Management Plan Datums  2nd version April 30, 2011  NAD83 CORS96 Epoch 2003  Pilot Project: Completed 2011  NAVD88 Geoid99-Alaska  Source Imagery & Metadata Accuracy  10 working days after collection  NMAS, CE90 40 feet (12.2m)  Orthomosaic imagery tiles & Cloud cover supporting information  < 10% per Spot satellite scene  Apr 30, 2011, Feb 28 2012, 2013, 2014 – subject to revision  Project completion: June 30, 2014
  5. 5. Deliverables1. Project management plan including team organizational initiatives2. Source imagery and metadata3. Orthomosaic imagery tiles, natural color & panchromatic with metadata a. DEM b. AT results c. Natural color data d. Panchromatic data4. Orthomosaic imagery tiles, color infra-red with metadata5. Project horizontal and vertical control a. Existing control b. Newly acquired control6. QA / QC reports7. Production files NOTE: Options for license uplifts and other deliverables
  6. 6. Geographic Area & Tile Sizes  1,561,622 sq km including 1-km buffer  4,608 tiles, 20K x 20K meters, 8K x 8K 2.5m pixels
  7. 7. Vertical Analysis of NED DEM  FGDC Accuracy  84 vertical points  RMSE 7.8 m  NSSDA 15.2 m  Maximum 22.9 m
  8. 8. Example Accuracy Results (meters)
  9. 9. Production Status Year 1 Year 2 Scenes 576 352 Collected Tiles 854 751 Produced Percentage 18% 17% of Project
  10. 10. Challenges – use of existing DEMS Yukon Flats – shaded relief 1/3 arcsec NED Nov/Dec 2010 from LiDAR NED base data
  11. 11. Additional Information “The Alaska Statewide Mapping Project” Professional Surveyor, Aerial Mapping March 2011 Issue, p 16
  12. 12. Thank you!

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