1. MODIS Land Product Subsets Suresh K. Santhana Vannan, Robert B. Cook, Bruce E. Wilson, Lisa M. Olsen HDF and HDF-EOS Workshop XII October 15 – October 17, 2008 ORNL DAAC Oak Ridge National Laboratory Distributed Active Archive Center Oak Ridge, Tennessee, USA

2. What is MODIS  MODerate Resolution Imaging Spectroradiometer  Hyper-Spectral sensor onboard two satellites (Terra and Aqua)  Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths  Data stored in HDF-EOS gridded file format Source : http://aqua.nasa.gov

3. MODIS is great! but …….. Users (Field researchers) have some inconveniences :

4. Volume

5.  Accessibility  Data Format  Processing Time

6. What ORNL-DAAC offers? User community requested that we prepare MODIS Land Products in an easy-to-use format and size To validate remote sensing products To characterize field sites

7. Tools Used hdp dumpsds from The HDF group Customized for our need MODIS Reprojection tool from LPDAAC GDAL (Geospatial Data Abstraction Library) Minnesota Map server Custom Perl code

8. MODIS Subsets for Selected sites Data Formats Offered ASCII – 7x7 km subsets ASCII – 7x7 km subsets GeoTIFF – 25x25 km subsets GeoTIFF – 25x25 km subsets MODIS Products offered at ORNL-DAAC Surface Reflectance Surface Temperature Land Cover Vegetation Phenology NDVI / EVI LAI / fPAR Net Photosynthesis Annual NPP Albedo (calc) Reflectance – BRDF Adjusted

10. Subsetting and Visualization Tool for Any location on Globe Demo: http://daac.ornl.gov/modisglobal

12. Case Study: Deforestation in Amazon

13. 1975 2001

14. 1975 2001 20002008

15. Dec 31 2010

16. Jan 1 2011

17. MODIS Subsetting Web Service ################ # ORNL DAAC MODIS Web service - Perl client ################# use SOAP::Lite @params= SOAP::Lite -> service(‘WSDL_URL') -> xmlschema('http://www.w3.org/2001/XMLSchema') -> getsubset(lat,lon,product,start_date,end_date,size); MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ days,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,200726 4203857,Clear_sky_days,NA,0.000,2 MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ nights,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,20072 64203857,Clear_sky_nights,NA,0.000,254 ……. MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ days,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,200726 4203857,Clear_sky_days,NA,0.000,2 MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ nights,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,20072 64203857,Clear_sky_nights,NA,0.000,254 ……. f(x) Client Server SOAP

18. Scope  Tool for scientific research (Environmental Impact assessment, carbon budgeting, etc.)  Classroom education and projects for students  Time series, trend analysis  GIS overlay analysis  Statistical analysis (Across many years and across different land cover types)  Validation of MODIS products and other remote sensing products

19. Questions? Links  http://www.modis.ornl.gov/modis/index.cfm http://www.modis.ornl.gov/modis/index.cfm  http://daac.ornl.gov/MODIS/modis.html http://daac.ornl.gov/MODIS/modis.html