MODIS/Terra Vegetation Cover Conversion 96-Day L3 Global 250m SIN Grid V004Entry ID: MOD44A4
Abstract: The MODIS/Terra Vegetation Cover Conversion 96-Day L3 Global 250m SIN Grid (MOD44A3) product is created from the results of the Vegetative Cover Conversion (VCC). The Vegetative Cover Conversion is produced on a quarterly basis by comparing data from the 3 months of the current year to the same 3 months of the previous year. The input for VCC is the MOD44C composite product. This composite is ... created from 16 days of daily data by performing a quality based per pixel method, which selects the most cloud free and highest spatial resolution data. Each of these composites is processed separately where the change is detected by comparison of the images.
In this version, the change being reported is from closed canopy forest cover to non-forest area for the humid tropical regions of the globe, which includes the area from 30 degees North latitude to 30 degrees South latitude. In future versions change will be reported for open canopy forest to non-forest area and for flooding on a global scale.
Forest cover is defined by using the Vegetation Continuous Fields product (MOD44B) where anything with 60% tree cover or more is classified as forest. This is consistent with the IGBP classification of a forest. A non-forest area is defined as an area with less than 40% tree cover. Any pixel that was identified as forest in year 1 and was then identified as non-forest in year 2 is flagged and recorded in one of the metrics layers. When all of the 16-day periods have been processed the metrics layers are compared. Any pixel that has been flagged in at least two of the metrics layers is recorded in the "labeled land cover change" layer. Categorical quality assurance, determined by the quality of the input data, is provided in the "labeled land cover change QA" layer. For specific information regarding values refer to the product user guide.
V004 Data Set Characteristics:
Area: ~10 degrees x 10 degrees lat/long
Image Dimensions: 2(4800 x 4800 rows/columns)
Average File Size: ~600 MB
Resolution: 250 meters
Data Format: HDF-EOS
Science Data Sets (SDS): 5
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Data Set Citation
Dataset Originator/Creator: Land Processes Distributed Active Archive Center (LP DAAC)
Dataset Title: MODIS/Terra Vegetation Cover Conversion 96-Day L3 Global 250m SIN Grid V004
Dataset Release Place: Sioux Falls, South Dakota, USA
Dataset Publisher: U.S. Geological Survey
Version: V004Online Resource: https://lpdaac.usgs.gov/
Start Date: 2002-01-01Stop Date: 2002-10-16
Latitude Resolution: 250 m
Longitude Resolution: 250 m
Horizontal Resolution Range: 250 meters - < 500 meters
Quality For more information on potential sensor-related anomalies, consult the following URL: http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/newPage.cgi?fileName=...
Access Constraints None
Use Constraints None
Data Set Progress
Distribution Media: HTTP
Distribution Size: ~600 MB
Distribution Format: HDF-EOS
Role: TECHNICAL CONTACT
Phone: (Toll Free) (866) 573-3222
Phone: (605) 594-6116
Fax: (605) 594-6963
Email: LPDAAC at usgs.gov
LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center 47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Moderate Resolution Imaging Spectroradiometer (MODIS) publications written by the MODIS Science Team: [available online at http://modis.gsfc.nasa.gov/sci_team/pubs/]
National Aeronautics and Space Administration, 2000, MODIS data products catalog (EOS AM platform): [Greenbelt, Maryland], Goddard Space Flight Center, http://modis.gsfc.nasa.gov/data/dataprod/index.php.
National Aeronautics and Space Administration, revised 2004, EOS Reference Handbook, a Guide to NASA's Earth Science Enterprise and the Earth Observing System: Greenbelt, Maryland, Goddard Space Flight Center, 261 p. [available online in pdf format at http://eospso.gsfc.nasa.gov/sites/default/files/publications/data_p...].
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-09-03
Last DIF Revision Date: 2013-12-06