1. Department of Geography University of New Orleans, Louisiana
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. ALI (July 30, 2010) Bands 4,5,6 merged with Pan band
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)
used in digital analysis
Hyperion

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

9. EO-1 Advanced Land Imager (ALI)
Bands
PAN
Visible
NIR –MIR 1 2 3 4 5 6 7 8 9
0.480 – 0.690
0.433 – 0.453
0.450 – 0.515
0.525 – 0.605
0.633 – 0.690
0.775 – 0.805
0.845 – 0.890
1.200 – 1.300
1.550 – 1.750
2.080 – 2.350
10 meter
30 meter
30 meter

10. METHODOLOGY

11. Damaged Buildings AOI Extraction
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

15. Visual Analysis… Worldview2 (18 January 2010)

16. Before
After

17. Before
After

18. Before
After

19. Before
After

20. Before
After

21. Before
After

22. Before
After

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

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

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

27. Normalized Difference Vegetation Index (NDVI)…

28. 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…

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

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