![UMD/hansen/global_forest_change_2023_v1_11](https://developers.google.com/earth-engine/datasets/images/UMD/UMD_hansen_global_forest_change_2023_v1_11_sample.png?authuser=0000)
- Dataset Availability
- 2000-01-01T00:00:00Z–2023-12-31T00:00:00Z
- Dataset Provider
- Hansen/UMD/Google/USGS/NASA
- Earth Engine Snippet
-
ee.Image("UMD/hansen/global_forest_change_2023_v1_11")
- Tags
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 corresponding to red, NIR, SWIR1, and SWIR2. 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 1.11 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.
Bands
Resolution
30.92 meters
Bands
Name | Units | Min | Max | Wavelength | Description | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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treecover2000 |
% | 0 | 100 | Tree canopy cover for year 2000, defined as canopy closure for all vegetation taller than 5m in height. |
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loss |
Forest loss during the study period, defined as a stand-replacement disturbance (a change from a forest to non-forest state). |
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gain |
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. |
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first_b30 |
0.63-0.69µm | Landsat Red cloud-free image composite (corresponding to Landsat 5/7 band 3 and Landsat 8/9 band 4). Reference multispectral imagery from the first available year, typically 2000. |
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first_b40 |
0.77-0.90µm | Landsat NIR cloud-free image composite (corresponding to Landsat 5/7 band 4 and Landsat 8/9 band 5). Reference multispectral imagery from the first available year, typically 2000. |
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first_b50 |
1.55-1.75µm | Landsat SWIR1 cloud-free image composite (corresponding to Landsat 5/7 band 5 and Landsat 8/9 band 6). Reference multispectral imagery from the first available year, typically 2000. |
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first_b70 |
2.09-2.35µm | Landsat SWIR2 cloud-free image composite (corresponding to Landsat 5/7 band 7 and Landsat 8/9 band 7). Reference multispectral imagery from the first available year, typically 2000. |
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last_b30 |
0.63-0.69µm | Landsat Red cloud-free image composite (corresponding to Landsat 5/7 band 3 and Landsat 8/9 band 4). Reference multispectral imagery from the last available year, typically the last year of the study period. |
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last_b40 |
0.77-0.90µm | Landsat NIR cloud-free image composite (corresponding to Landsat 5/7 band 4 and Landsat 8/9 band 5). Reference multispectral imagery from the last available year, typically the last year of the study period. |
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last_b50 |
1.55-1.75µm | Landsat SWIR1 cloud-free image composite (corresponding to Landsat 5/7 band 5 and Landsat 8/9 band 6). Reference multispectral imagery from the last available year, typically the last year of the study period. |
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last_b70 |
2.09-2.35µm | Landsat SWIR2 cloud-free image composite (corresponding to Landsat 5/7 band 7 and Landsat 8/9 band 7). Reference multispectral imagery from the last available year, typically the last year of the study period. |
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datamask |
Three values representing areas of no data, mapped land surface, and permanent water bodies. |
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lossyear |
0 | 23 | 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 1-23, representing loss detected primarily in the year 2001-2023, respectively. |
Terms of Use
Terms of Use
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. 10.1126/science.1244693 Data available on-line at: https://glad.earthengine.app/view/global-forest-change.
DOIs
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.Image('UMD/hansen/global_forest_change_2023_v1_11'); var treeCoverVisParam = { bands: ['treecover2000'], min: 0, max: 100, palette: ['black', 'green'] }; Map.addLayer(dataset, treeCoverVisParam, 'tree cover 2000'); var treeLossVisParam = { bands: ['lossyear'], min: 0, max: 23, palette: ['yellow', 'red'] }; Map.addLayer(dataset, treeLossVisParam, 'tree loss year');