MODIS Land Data Products

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MODIS Land Data Products

• From Land Processes DAAC
• Calli Jenkerson
• Senior Scientist

SAIC, contractor to U.S. Geological Survey
(USGS) Center for Earth Resources Observation and
Science, Sioux Falls, SD. Work performed under
USGS contract 03CRCN0001.
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http//lpdaac.usgs.gov
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MODIS LAND DATA OVERVIEW
Radiation Budget Ecosystem Land
Cover
Surface Reflectance Vegetation Index
Thermal Anomalies/Fire BRDF/Albedo
LAI/FPAR
Land Cover / Change Temperature/Emissivity
GPP Veg Cover Conversion
Veg Continuous Fields
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The number and volume of land products available
far exceeds what is produced by the ocean and
atmosphere groups
An investigator website exists for each
product. This would be the starting point for
exploring any of the land products you wish to
use.
Since Surface Reflectance is the foundation for
many of the other land products lets take a
quick look .
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Begin at the main LP-Daac page
http//lpdaac.usgs.gov/main.asp
Choose the product name you want to explore from
the drop down data products menu.
Click on the title heading from the list and then
follow the link to the product description page.
Explore the link to the product description page
and the link to the PI-maintained product page.
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Land Product Characteristics
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Land Product Sources

• Terra (February 2000 present)
• MOD
• Aqua (July 2002 present)
• MYD
• Combined (February 2000 present)
• MCD

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MODIS Collection 4 to 5 Transition
Historic record up to Dec. 31, 2006
Collection 4
C5 forward
C5 reprocessing
Collection gap May be filled by as early as
March 2008, pending planned increases in
production rates
Jan. 1, 2007 to near current
Historic record through 2002
C5 Impacts Improved products reduced file
sizes discontinuities w/ C4
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Important points when ordering data

• Since location is important for land products
  they are in tile format so location is constant
• For 8 day or monthly products make sure your time
  interval is long enough
• If your product is available in the data pool
  this is your best (and cheapest) option to obtain
  data.
• It is best to order the most recent collection
  but make sure it has been processed and is
  available

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Common Data Access Methods
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Less Common Data Access Methods
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Upcoming Data AccessMRTWeb

GloVis (Selection Interface)
MRT (Processing Tool)
Mosaic tiles Subset an area from a tile, mosaic,
or time series Eliminate unwanted bands or
layers Define projection (n14) Set resampling
options Choose file format (HDF, GeoTIFF, binary)
Rapidly visualize tiles within map
context Navigate through time and space Select
tiles of interest for processing
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MRTWeb Status Plans

• Completed Beta testing with internal users
• Refinements and fixes in work
• Arranging Beta testing with external users
• Public release aimed for Spring 2008
• Plan to replace Data Pool GUI conversion
  services for MODIS tiled data
• Plan to pursue development opportunities -
• QA/QC bit filtering
• Additional file formats (e.g, NetCDF)

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Website Redesign

• Improved access to information
• Streamline site navigation
• Clarify product specifications documentation
• Provide clear pathway to appropriate data
  acquisition method
• Communicate application and impact of data
  products
• Institute additional user feedback mechanisms

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Website Redesign
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Questions, Comments, Concerns

• LP DAAC User Services
• lpdaac_at_eos.nasa.gov
• 605 594 6116