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January 12, 2010 Haitian Earthquake Damage Assessment Using High Resolution Satellite Imagery

January 12, 2010 Haitian Earthquake Damage Assessment Using High Resolution Satellite Imagery. Mahtab A. Lodhi, Ph.D. Department of Geography University of New Orleans, Louisiana. Natural disasters…. …are extreme events within the earth’s system…

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January 12, 2010 Haitian Earthquake Damage Assessment Using High Resolution Satellite Imagery

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  1. January 12, 2010 Haitian Earthquake Damage Assessment Using High Resolution Satellite Imagery Mahtab A. Lodhi, Ph.D. Department of Geography University of New Orleans, Louisiana

  2. Natural disasters… • …are extreme events within the earth’s system… • …the economic losses due to natural disasters have shown a significant increase in recent years…

  3. …hazard and disaster …hazard – a potentially damaging phenomenon…

  4. ….Remote sensing for disaster management… Preparedness Mitigation Disaster Event Reconstruction Relief Efforts Rehabilitation

  5. Study Area

  6. Study Area ALI (July 30, 2010) Bands 4,5,6 merged with Pan band

  7. Imagery Data Used • DigitalGlobe Constellation • Quickbird & Worldview–2 • Pre & Post Event • used in visual Analysis • NASA’S Earth Observing–1 (EO–1) • Advanced Land Imager (ALI) • Pre & Post Event • used in digital analysis • Hyperion • Pre & Post Event

  8. Spatial resolution VS. spectral resolution Hyperion WorldView-2

  9. EO-1 Advanced Land Imager (ALI) 10 meter 30 meter 30 meter

  10. METHODOLOGY

  11. Pre & post-WorldView2 Post EO-1A Post EO-1A Mosaic Rectification Raw (DN) Visual Analysis HPF Merging NDVI Damaged Buildings AOI Extraction AOI Extraction ISODATA ISODATA Recoded Image Recoded Image Merged Image Damage Map

  12. Worldview-2 Mosaic

  13. GEOMETRIC CORRECTION OF ALI

  14. Visual Analysis… Worldview2 (18 January 2010)

  15. Before After

  16. Before After

  17. Before After

  18. Before After

  19. Before After

  20. Before After

  21. Before After

  22. … on-screen delineation of damaged buildings using post event Worldview2 imagery…

  23. Damaged buildings AOI extracted from post event Worldview2 imagery.

  24. Digital Analysis: - EO-1 ALI (30 July 2010)

  25. Normalized Difference Vegetation Index (NDVI)…

  26. ISODATA Clustering of EO1 Data… …starts with all pixels as members of spectral class number 1, then creates fewer variable spectral classes from the initial variable spectral classes…

  27. …some challenges of working RS data in urban environment…

  28. Thank you. WorldView-2 & Quickbird Data Courtesy of DigitalGlobe Inc. EO-1 ALI and Hyperion Data Provided by USGS.

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