1 / 27

Houston-Galveston Area Council Remote Sensing Data Project

Houston-Galveston Area Council Remote Sensing Data Project. Pixxures’ Presentation Wendy Luck Ashley Shepherd September 2, 2009. Overview of H-GAC project. Customer Needs: Imagery with Currency Quality Accuracy Meeting the various needs of constituents

ceri
Télécharger la présentation

Houston-Galveston Area Council Remote Sensing Data Project

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Houston-Galveston Area CouncilRemote Sensing Data Project Pixxures’ Presentation Wendy Luck Ashley Shepherd September 2, 2009

  2. Overview of H-GAC project • Customer Needs: • Imagery with • Currency • Quality • Accuracy • Meeting the various needs of constituents • Pixxures is experienced with direct digital orthophotography collection and production on a large scale

  3. Pixxures Background • Founded in 1999 • Cost-effective orthophotography provider • Online mapping services and delivery • Direct Digital Production since 2004 • Streamlined ADS workflow • Continuous R&D efforts to improve speed and throughput • Scalable processing architecture

  4. Flight planning summary • Flight Layout • TBD - upon final product selection(s) • 1-Foot GSD • 0.5-Foot GSD • Additional side overlap in Downtown (CBD) areas according to hi-rise building location • Priority areas • Ground Control Layout • TBD - upon final product selection and tailored to corresponding flight plans

  5. Collection • Baseline collection plan • Weather forecasting (daily weather tracking, unusual events i.e. La Nina/El Nino) • Number of clear hours expected above 30 degrees within the flight window • Collection planned by Priority areas/ efficient collection blocks • QC in field by flight crews • Delivery to Pixxures

  6. Flight Plan Example

  7. Building Lean Solution

  8. “Front End” Summary • Official AOIs Defined (1-foot & 0.5-foot GSD) • Flight and Control layout generated • CFM validated and prepped • Collection and Field QC • Transfer to Production in Arvada, CO • Archive (redundant copies for safety) • Validation/QC for acceptance of imagery • Quick QC for artifacts that will generate a reflight decision • Introduced into Production Lifecycle (AT first) • Rectification and handoff to “back end” production

  9. “Back End” Summary • Radiometry: Gradient Removal and Color Balancing • Seaming • Strategic QC of seamlines and water • Big tile QC of urban areas • Final Tile (Lambert tiles) QC for overall compliance with specs • Final color matching to customer choice • Delivery

  10. Production: Radiometry Before After gradient removal, color balancing, and enhancement

  11. Seamline Placement • Seamlines are placed to minimize impacts to buildings, roads, and manmade features • Seamlines are placed to use as much of the “nadir” flight line as possible • Water bodies are crossed perpendicularly to aid in gradient fixes

  12. Seamline Example

  13. Image QC Tool • Online QC Tool developed at Pixxures • Pan, zoom, draw box around an error, attribute the error • Export errors as shapefile • Fix errors and merge back into dataset • Recheck that fixes were made • Local or online capability • Merrick QC assistance

  14. Project Management • Communication • PM is single point of contact • Internal communication of customer priorities and requirements to production team • External communication of status, risk management, and solutions • Tracking and Reporting • Flight progress • Production progress • Delivery status

  15. Delivery Schedule • Per GSD: • Collection by “block” of Lamberts will feed into production on a rolling basis • Pilot sample delivered within Q1 2010 • Final delivery of tiffs by July-Aug 2010 • Delivery of SIDs to follow within 2 weeks • CIR collection is simultaneous; production requires same timeframe as RGB

  16. Questions?

  17. Extra Slides

  18. H-GAC Existing 2008 Data

  19. Production Throughput • Throughput schedule based on square miles is tied to requests per Lambert • 1 ft with acceptable existing DEM • 1 - 2500 sq mi = 30 business days • 2501 - 5000 sq mi = 60 bus days • 5001 - 7500 sq mi = 90 bus days • 7501 - 12500+ = 120 bus days • 6" with acceptable existing DEM • 1 - 250 sq mi = 30 bus days • 251 - 500 sq mi = 60 bus days • 501 - 750 sq mi = 90 bus days • 751 - 1000+ sq mi = 120 bus days

  20. Pricing

  21. DG Overview • Digital Globe Aerial Project • Collected and processed 238,500 sq miles of 1’ ADS imagery in 2008 and 2009 • 90 day collection window per AOI • Average delivery within 45 calendar days • 20 to 55 days actual range • 100% of AOIs met quality specifications • Online status report customized per customer specs

  22. Acquisition Parameters

  23. Aspects of ADS Digital Sensors

  24. Enhanced RGB 1’ GSD

  25. Collection Rates • Collecting 1’ ADS Imagery • During a single 4-hour lift, each aircraft can acquire imagery for 750 to 1,000 sq. miles • Collecting 6” ADS Imagery • Depends heavily on AOI shape, flight line length, additional flight lines required (added sidelap) and other misc. specs.

More Related