How brown was my valley?: Using Remote Sensing to View County‐level Observations of the Texas Drought 2011‐12

Teresa Howard, Gordon Wells,
Solar Smith & Larry Teng
The University of Texas at Austin
Center for Space Research

Transcript

1. How brown was my valley? Teresa Howard, Gordon Wells, Solar Smith & Larry Teng The University of Texas at Austin Center for Space Research October 3, 2012 Using Remote Sensing to View County‐level Observations of the Texas Drought 2011‐12 Texas GIS Forum 2012
2. Normalized Difference Vegetation Index September 30, 2010 Source: 16‐day cycle MODIS UT Center for Space Research
3. Normalized Difference Vegetation Index September 30, 2011 Source: 16‐day cycle MODIS UT Center for Space Research
4. Red & Blue light Green & Infrared light absorbed reflected chlorophyll
5. NIR ‐ Red NIR + Red NDVI Normalized Difference Vegetation Index (NDVI) equation
6. MODIS Visible Red Band 1
7. MODIS Near Infrared Band 2
8. Source: NASA’s MOD 13 - Gridded Vegetation Indices (NDVI & EVI) MODIS NDVI Single-band raster Theoretical Range: -1 to 1 16-day : highest NDVI value CSR applies color map CSR applies water mask
9. Normalized Difference Vegetation Index August 28 ‐ September 12, 2001 Source: 16‐day cycle MODIS UT Center for Space Research
10. Normalized Difference Vegetation Index August 28 ‐ September 12, 2002 Source: 16‐day cycle MODIS UT Center for Space Research
11. Normalized Difference Vegetation Index August 28 ‐ September 12, 2003 Source: 16‐day cycle MODIS UT Center for Space Research
12. Normalized Difference Vegetation Index August 28 ‐ September 12, 2004 Source: 16‐day cycle MODIS UT Center for Space Research
13. Normalized Difference Vegetation Index August 28 ‐ September 12, 2005 Source: 16‐day cycle MODIS UT Center for Space Research
14. Normalized Difference Vegetation Index August 28 ‐ September 12, 2006 Source: 16‐day cycle MODIS UT Center for Space Research
15. Normalized Difference Vegetation Index August 28 ‐ September 12, 2007 Source: 16‐day cycle MODIS UT Center for Space Research
16. Normalized Difference Vegetation Index August 28 ‐ September 12, 2008 Source: 16‐day cycle MODIS UT Center for Space Research
17. Normalized Difference Vegetation Index August 28 ‐ September 12, 2009 Source: 16‐day cycle MODIS UT Center for Space Research
18. Normalized Difference Vegetation Index August 28 ‐ September 12, 2010 Source: 16‐day cycle MODIS UT Center for Space Research
19. Normalized Difference Vegetation Index August 28 ‐ September 12, 2011 Source: 16‐day cycle MODIS UT Center for Space Research
20. Normalized Difference Vegetation Index August 28 ‐ September 12, 2012 Source: 16‐day cycle MODIS UT Center for Space Research
21. > 5% > 5% higher lower Inter‐Annual Greening & Browning 2012 – 2011 July 20 – August 3 Source: 16‐day cycle MODIS UT Center for Space Research
22. > 5% > 5% NDVI change positive negative Inter‐Annual Greening & Browning 2012 ‐ Average 2002‐2010 July 20 – August 3 Source: 16‐day cycle MODIS UT Center for Space Research
23. September 30 2010
24. September 30 2011
25. April 6 2012
26. September 30 2010 September 30 2010
27. September 30 2011 September 30 2011
28. April 6 2012 April 6 2012
29. Agriculture Mask for NDVI
36. TEXAS MODIS NDVI VIEWER A configurable web mapping application based on ESRI’s Flex API
49. THANK YOU! Contact: Teresa Howard howard@csr.utexas.edu http://goodnight.corral.tacc.utexas.edu/CSR/Public/NDVI‐MODIS/