Increasing Access to MODIS datathrough Web services and visualization tools
Suresh K.S. VannanORNLOak Ridge, TN, USA
Remote Sensing - Beyond Images Dec 15th 2013
Background
ORNL DAAC: NASA’s archive for biogeochemical dynamics and terrestrial ecology data
http://daac.ornl.gov/MODIS
• To characterize field sites• Provide quick access to MODIS data
MODIS Subsetting and Visualization Tool
Challenges:
Accessibility
Data Format
Processing Time
MODIS Land Product Subsetting Toolso In a scale and format (text,
GeoTIFF)o useful for field researchers
Methods to obtain subsets:
Tool 1 : MODIS Global tool subsets:– Subsets and visualization
Tool 2: Web Service:– Programmatically obtain MODIS
subsets
MODIS Land Products at ORNL DAACSurface Reflectance
Surface Temperature Land Cover
Vegetation Phenology NDVI / EVI
LAI / fPARNet Photosynthesis
Annual NPPAlbedo
EvapotranspirationReflectance – BRDF Adjusted
MODIS Global tool – http://daac.ornl.gov/modisglobal
Ordering Interface
MODIS Global tool - features
Ordering Interface
MODIS Global tool - features
Custom Interface for data order
Average Time to process: About 3 minutes
MODIS Global tool - features
Custom Interface for data order
MODIS Global tool - features
Custom Interface for data order
MODIS Global tool - Summary
Ordering Interface
Custom Interface for data order
Multiple Visualizations with link to phenology and land cover data
Get MODIS Subsets through machine to machine interaction
Retrieve Subsets using:
• Command line ( Perl)• Workflows (Kepler)• JAVA• Python• R• Matlab
MODIS Web Service – http://daac.ornl.gov/modiswebservice
getsubset (40,-110,"MOD13Q1”,"250m_16_days_NDVI”,"A2000065”,"A20000081", 10,10)
MOD13Q1.A2000065.h09v04.005.2008238050507.250m_16_days_NDVI, 1177, 1164, 1116, 1198, 1256, 1226, 1177, 1154, 1267, 1348, 1277, 1345, 1411, 1341, 1278, 1217, 1232, 1244, 1262
MODIS Web Service – subsets command
Applications – Field work
Example of field site applications
Soilscape
