Published on February 17, 2014
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
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
MODIS is great! but …….. Users (Field researchers) have some inconveniences :
Accessibility Data Format Processing Time
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
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
MODIS Subsets for Selected sites MODIS Products offered at ORNL-DAAC Data Formats Offered ASCII – 7x7 km subsets GeoTIFF – 25x25 km subsets Surface Reflectance Surface Temperature Land Cover Vegetation Phenology NDVI / EVI LAI / fPAR Net Photosynthesis Annual NPP Albedo (calc) Reflectance – BRDF Adjusted
Subsetting and Visualization Tool for Any location on Globe Demo: http://daac.ornl.gov/modisglobal
Case Study: Deforestation in Amazon
1975 2001 2000 2008
Dec 31 2010
Jan 1 2011
MODIS Subsetting Web Service f(x) Client ################ # 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); SOAP SOAP Server MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ days,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,200726 days,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,200726 4203857,Clear_sky_days,NA,0.000,2 4203857,Clear_sky_days,NA,0.000,2 MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ MOD11A2.A2003001.h26v05.005.2007264203857.Clear_sky_ nights,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,20072 nights,MOD11A2,A2003001,Lat37.7Lon110Samp1Line1,20072 64203857,Clear_sky_nights,NA,0.000,254 64203857,Clear_sky_nights,NA,0.000,254 ……. …….
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
Questions? Links http://www.modis.ornl.gov/modis/index.cfm http://daac.ornl.gov/MODIS/modis.html
The following MODIS Land Product Subsets resources are maintained by the ORNL DAAC: MODIS Land Products Offered;
ORNL DAAC MODIS ... MODIS Collection 5; Global Subsetting and Visualization Tool Create subset for user selected site, area, product, and time period.
ORNL DAAC MODIS Land Product Subsets . 1. Suresh K. Santhana Vannan, Robert B. Cook, Bruce E. Wilson, Lisa M. Olsen. Environmental Sciences Division, Oak ...
Global Subsetting Tool: MODIS Land Products. Specify the Coordinates for the Center of Area of Interest. Enter Coordinates of Center Pixel ...
The MODIS Land Product Subsets (MODIS_LPS) perl script allows for the easy subsetting of the MODIS land products using the ORNL DAAC.
MODIS Land Product Subsets: Remote Sensing Products for Field Sites (Collections 4 and 5) Bob Cook, Suresh Kumar, ... MODIS Land Products (C5) at ORNL DAAC
... at http://daac.ornl.gov/modisglobal. The new subsetting tool allows users to create custom subsets for 14 MODIS land products from Terra and Aqua ...
Oak Ridge National Laboratory DAAC (ORNL DAAC) ... and MODIS Land Product Subsets. ORNL DAAC data are ... Subset and Visualize NASA MODIS Land Data using ...
MODIS Land Science Team ... Land Product Validation & Evolution workshop, ... NSIDC DAAC ; ORNL DAAC (Land Subsets)