Hansen Forest Cover Gain 2000-2012: Thailand, Vietnam, Laos, Cambodia, Myanmar
Published by: Open Development Mekong
Data Resources (1)
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Additional Info
| Field | Value |
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| Use limitations | You are free to copy and redistribute the material in any medium or format, and to transform and build upon the material for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made. Use the following credit when these data are displayed: Source: Hansen/UMD/Google/USGS/NASA |
| Dataset reference date | July 11, 2012 |
| Temporal extent's start date | February 3, 2000 |
| Temporal extent's end date | February 3, 2012 |
| GeoNames |
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| West bounding coordinates | 92.17261642300014 |
| East bounding coordinates | 110.00011642300014 |
| South bounding coordinates | 5.6100655150000875 |
| North bounding coordinates | 28.548315515000088 |
| Spatial Reference System | WGS 84 (EPSG:4326) (CRS:84) |
| Positional Accuracy | There are no known issues with accuracy. |
| Logical Consistency | There are no known issues with logical consistency. |
| Completeness | When zoomed out (< zoom level 13), pixels of gain are shaded according to the density of gain at the 30 x 30 meter scale. Pixels with darker shading represent areas with a higher concentration of tree cover gain, whereas pixels with lighter shading indicate a lower concentration of tree cover gain. There is no variation in pixel shading when the data is at full resolution (≥ zoom level 13). |
| Process Step | The data were generated using multispectral satellite imagery from the Landsat 7 thematic mapper plus (ETM+) sensor. Over 600,000 Landsat 7 images were compiled and analyzed using Google Earth Engine, a cloud platform for earth observation and data analysis. The clear land surface observations (30 × 30 meter pixels) in the satellite images were assembled and a supervised learning algorithm was then applied to identify per pixel tree cover gain. Tree cover gain was defined as the establishment of tree canopy at the Landsat pixel scale in an area that previously had no tree cover. Tree cover gain may indicate a number of potential activities, including natural forest growth or the crop rotation cycle of tree plantations. Open Development Mekong has trimmed this data to the area of interest visualised here. |
| Lineage | 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: http://earthenginepartners.appspot.com/science-2013-global-forest. |
| Responsible party | Department of Geographical Sciences University of Maryland, 2181 Samuel J. LeFrak Hall, 7251 Preinkert Drive, College Park, MD 20742 Phone: 301-405-4050 http://geog.umd.edu/ |
| Metadata creator information | Metadata last updated on 2016-02-03. For inquiries contact: Open Development Cambodia, contact@opendevcam.net, +855 23 221 164, http://www.opendevelopmentcambodia.net, 43 St. 208, Sangkat Boeung Riang, Khan Daun Penh, Phnom Penh, Cambodia. |
| Attributes | |
| License | CC-BY-4.0 |
| Copyright | Yes |
| Version | 1.7 |
| Keywords | tree cover |
| Date uploaded | July 9, 2015, 10:05 (UTC) |
| Date modified | December 17, 2020, 20:29 (UTC) |