VCF5KYR v001

MEaSUREs Vegetation Continuous Fields (VCF) Yearly Global 0.05 Deg


PI: Matthew Hansen

Description

The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Vegetation Continuous Fields (VCF) Version 1 data product (VCF5KYR) provides global fractional vegetation cover at 0.05 degree (5,600 meter) spatial resolution at yearly intervals from 1982 to 2016. The VCF5KYR data product is derived from a bagged linear model algorithm using Long Term Data Record Version 4 (LTDR V4) data compiled from Advanced Very High Resolution Radiometer (AVHRR) observations. Fractional vegetation cover (FVC) is the ratio of the area of the vertical projection of green vegetation above ground to the total area, capturing the horizontal distribution and density of vegetation on the Earth’s surface. FVC is a primary means for measuring global forest cover change and is a key parameter for a variety of environmental and climate-related applications, including carbon land surface models and biomass measurements. The three bands included in each VCF5KYR Version 1 GeoTIFF are: percent of tree cover, non-tree vegetation, and bare ground. A water mask was applied with all pure water pixels (defined as ≥ 95% water coverage) set to zero.

Data from years 1994 and 2000 were excluded due to lack of data in the LTDR V4.

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Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionMEaSUREs VCF
DOI10.5067/MEaSUREs/VCF/VCF5KYR.001
File Size~80 KB
Temporal ResolutionYearly
Temporal Extent1982-01-01 to 2016-12-31
Spatial ExtentGlobal
Coordinate SystemGeographic Latitude and Longitude
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic Dimensions90 degrees lat x 180 degrees lon

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers3
Columns/Rows7200 x 3600
Pixel Size5600 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Band 1 Percent Tree Cover: Percent of pixel covered by tree canopy Percent 8-bit unsigned integer N/A N/A 0 to 100 N/A
Band 2 Percent Non-Tree Vegetation: Percent of pixel covered by green vegetation not covered by tree canopy Percent 8-bit unsigned integer N/A N/A 0 to 100 N/A
Band 3 Percent Bare Ground: Percent of pixel not covered by living vegetation Percent 8-bit unsigned integer N/A N/A 0 to 100 N/A

Product Quality

Quality information was not produced for this version; however, it will be included in future product versions.

Known Issues

Known issues, including constraints and limitations, are provided on page 10 of the Algorithm Theoretical Basis Document (ATBD).

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/MEaSUREs/VCF/VCF5KYR.001

About the Image

Vegetation Continuous Fields (VCF) Percent Tree Cover data from the VCF5KYR product across the globe, 2016.

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