umd_tree_cover_density_2000
created_on
2023-05-04T13:11:58.897143
updated_on
2024-10-04T16:27:40.023962
resolution_description
30 × 30 meters
geographic_coverage
Global land (excluding Antarctica and Arctic islands)
citation
Use the following credit when these data are displayed:
Source: Hansen/UMD/Google/USGS/NASA, accessed through Global Forest Watch
Use the following credit when these data are cited:
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 from:https://glad.umd.edu/dataset/global-2010-tree-cover-30-m. Accessed through Global Forest Watch on [date]. www.globalforestwatch.org
source
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 from: [https://glad.umd.edu/dataset/global-2010-tree-cover-30-m](https://glad.umd.edu/dataset/global-2010-tree-cover-30-m).
license
[CC BY 4.0](http://creativecommons.org/licenses/by/4.0/)
overview
This data set, a collaboration between the [GLAD](http://glad.geog.umd.edu/) (Global Land Analysis & Discovery) lab at the University of Maryland, Google, USGS, and NASA, displays tree cover over all global land (except for Antarctica and a number of Arctic islands) for the years 2000 and 2010 at 30 × 30 meter resolution. “Percent tree cover” is defined as the density of tree canopy coverage of the land surface and is color-coded by density bracket (see legend).<br><br>Data in this layer were generated using multispectral satellite imagery from the [Landsat 7](http://landsat.usgs.gov/) thematic mapper plus (ETM+) sensor. The clear surface observations from over 600,000 images were analyzed using Google Earth Engine, a cloud platform for earth observation and data analysis, to determine per pixel tree cover using a supervised learning algorithm.<br><br>The tree cover canopy density of the displayed data varies according to the selection - use the legend on the map to change the minimum tree cover canopy density threshold.
function
Identifies areas of tree cover
cautions
For the purpose of this study, “tree cover” was defined as all vegetation taller than 5 meters in height. “Tree cover” is the biophysical presence of trees and may take the form of natural forests or plantations existing over a range of canopy densities.
key_restrictions
CC BY 4.0
why_added
Important baseline for the Hansen change layers
learn_more
http://science.sciencemag.org/content/342/6160/850
id
ca602916-e706-4c2f-b0f1-23dc3976a47f