Hansen Global Forest Change v1.6 (2000-2018) [deprecated]

Caution: This dataset has been superseded by UMD/hansen/global_forest_change_2024_v1_12.

Dataset Availability

2000-01-01T00:00:00Z–2019-01-01T00:00:00Z

Dataset Provider

Hansen/UMD/Google/USGS/NASA

Earth Engine Snippet

ee.Image("UMD/hansen/global_forest_change_2018_v1_6")

Tags

forest

forest-biomass

geophysical

hansen

landsat-derived

umd

Description

Results from time-series analysis of Landsat images in characterizing global forest extent and change.

The 'first' and 'last' bands are reference multispectral imagery from the first and last available years for Landsat spectral bands 3, 4, 5, and 7. Reference composite imagery represents median observations from a set of quality-assessed growing-season observations for each of these bands.

Please see the User Notes for this Version 1.6 update, as well as the associated journal article: Hansen, Potapov, Moore, Hancher et al. "High-resolution global maps of 21st-century forest cover change." Science 342.6160 (2013): 850-853.

Note that updated versions of this data are available. The newest version, Version 1.9 (produced with data through 2021), is available as UMD/hansen/global_forest_change_2021_v1_9.

Bands

Pixel Size
30.92 meters

Bands

Name	Units	Min	Max	Pixel Size	Wavelength	Description
treecover2000	%	0	100	meters	None	Tree canopy cover for year 2000, defined as canopy closure for all vegetation taller than 5m in height.
loss				meters	None	Forest loss during the study period, defined as a stand-replacement disturbance (a change from a forest to non-forest state).
Bitmask for loss Bit 0: Forest loss during the study period. 0: Not loss 1: Loss
gain				meters	None	Forest gain during the period 2000-2012, defined as the inverse of loss (a non-forest to forest change entirely within the study period). Note that this has not been updated in subsequent versions.
Bitmask for gain Bit 0: Forest gain during the period 2000-2012. 0: No gain 1: Gain
first_b30				meters	0.63-0.69µm	Landsat 7 band 3 (red) cloud-free image composite. Reference multispectral imagery from the first available year, typically 2000.
first_b40				meters	0.77-0.90µm	Landsat 7 band 4 (NIR) cloud-free image composite. Reference multispectral imagery from the first available year, typically 2000.
first_b50				meters	1.55-1.75µm	Landsat 7 band 5 (SWIR) cloud-free image composite. Reference multispectral imagery from the first available year, typically 2000.
first_b70				meters	2.09-2.35µm	Landsat 7 band 7 (SWIR) cloud-free image composite. Reference multispectral imagery from the first available year, typically 2000.
last_b30				meters	0.63-0.69µm	Landsat 7 band 3 (red) cloud-free image composite. Reference multispectral imagery from the last available year, typically the last year of the study period.
last_b40				meters	0.77-0.90µm	Landsat 7 band 4 (NIR) cloud-free image composite. Reference multispectral imagery from the last available year, typically the last year of the study period.
last_b50				meters	1.55-1.75µm	Landsat 7 band 5 (SWIR) cloud-free image composite. Reference multispectral imagery from the last available year, typically the last year of the study period.
last_b70				meters	2.09-2.35µm	Landsat 7 band 7 (SWIR) cloud-free image composite. Reference multispectral imagery from the last available year, typically the last year of the study period.
datamask				meters	None	Three values representing areas of no data, mapped land surface, and permanent water bodies.
Bitmask for datamask Bits 0-1: Three values representing areas of no data, mapped land surface, and permanent water bodies. 0: No data 1: Mapped land surface 2: Permanent water bodies
lossyear		0	18	meters	None	Year of gross forest cover loss event. Forest loss during the study period, defined as a stand-replacement disturbance, or a change from a forest to non-forest state. Encoded as either 0 (no loss) or else a value in the range 1-18, representing loss detected primarily in the year 2001-2018, respectively.

Terms of Use

Terms of Use

CC-BY-4.0

Citations

Citations:

• Hansen, M. C., P. V. Potapov, R. Moore, M. Hancher, S. A. Turubanova, A. Tyukavina, D. Thau, S. V. Stehman, S. J. Goetz, T. R. Loveland, A. Kommareddy, A. Egorov, L. Chini, C. O. Justice, and J. R. G. Townshend. 2013. "High-Resolution Global Maps of 21st-Century Forest Cover Change." Science 342 (15 November): 850-53. Data available on-line at: https://glad.earthengine.app/view/global-forest-change.

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Code Editor (JavaScript)

var dataset = ee.Image('UMD/hansen/global_forest_change_2018_v1_6');

var visualization = {
  bands: ['treecover2000'],
  min: 0.0,
  max: 100.0,
  palette: [
    '3d3d3d','080a02','080a02','080a02','106e12','37a930',
    '03ff17',
  ]
};

Map.setCenter(-60.5, -20.0, 2);

Map.addLayer(dataset, visualization, 'Tree Canopy Cover');

Open in Code Editor

Hansen Global Forest Change v1.6 (2000-2018) [deprecated]

Results from time-series analysis of Landsat images in characterizing global forest extent and change. The 'first' and 'last' bands are reference multispectral imagery from the first and last available years for Landsat spectral bands 3, 4, 5, and 7. Reference composite imagery represents median observations from a set of quality-assessed …

UMD/hansen/global_forest_change_2018_v1_6, forest,forest-biomass,geophysical,landsat-derived,umd

2000-01-01T00:00:00Z/2019-01-01T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets