GFCC30TC v003

Global Forest Cover Change (GFCC) Tree Cover Multi-Year Global 30 m


PI: J. Townshend

Description

The Land Processes Distributed Active Archive Center (LP DAAC) archives and distributes Global Forest Cover Change (GFCC) data products through the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program. The GFCC Tree Cover Multi-Year Global dataset is available for four epochs centered on the years 2000, 2005, 2010, and 2015. The dataset is derived from the GFCC Surface Reflectance product (GFCC30SR), which is based on enhanced Global Land Survey (GLS) datasets. The GLS datasets are composed of high-resolution Landsat 5 Thematic Mapper (TM) and Landsat 7 Enhanced Thematic Mapper Plus (ETM+) images at 30 meter resolution. GFCC30TC provides tree canopy information and can be used to understand forest changes. Each tree cover product features four files associated with it; a tree cover layer with an embedded color map, a tree cover error (uncertainty) file, and an index (provenance) file, plus a list of path/rows that relate to the Surface Reflectance input files. Note that the index file and file list were not generated for the 2015 epoch. Data follow the Worldwide Reference System-2 tiling scheme. Additional details regarding the methodology used to create the data are available in the Algorithm Theoretical Basis Document (ATBD).

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Characteristics

Collection and Granule

Collection

Characteristic Description
CollectionMEaSUREs GFCC
DOI10.5067/MEaSUREs/GFCC/GFCC30TC.003
File Size~70 MB
Temporal ResolutionMulti-Year
Temporal Extent1999-06-01 to 2015-12-31
Spatial ExtentGlobal
Coordinate SystemUniversal Transverse Mercator (UTM)
DatumWorld Geodetic System (WGS84)
File FormatGeoTIFF
Geographic Dimensions170 km x 183 km

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers3
Columns/RowsVaries by scene
Pixel Size30 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
TC Tree Cover Percent 8-bit unsigned integer 200 to 220 N/A 0 to 100 N/A
TC.idx¹ Tree Cover Index N/A 8-bit unsigned integer 0 N/A 1 to 255 N/A
TC.err Tree Cover Error Percent 32-bit floating point -9999 N/A 0 to 4294966531 N/A

¹TC.idx files are only available for 2000, 2005, and 2010; they were not generated for the 2015 epoch.

Tree Cover Values

Value Description
0 to 100 Percent of pixel area covered by tree cover
200 Water
210 Cloud
211 Shadow
220 Fill Value

Product Quality

Additional information on Quality Assessment is provided in the User Guide under Section 5.1.1.3 on page 25.

Documentation

Using the Data

Tools

Citation

DOI: 10.5067/MEaSUREs/GFCC/GFCC30TC.003

About the Image

Global Forest Cover Change (GFCC) tree cover data from the GFCC30TC product over Brazil, 2010.

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