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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.

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Presentation on theme: "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."— Presentation transcript:

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

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

11

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


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