Hansen Forest Cover Gain 2000-2012: Thailand, Vietnam, Laos, Cambodia, Myanmar

Published by: Open Development Mekong

Forest gain during the period 2000–2012, defined as the inverse of loss, or a non-forest to forest change entirely within the study period. Encoded as either 1 (gain) or 0 (no gain). 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. “Loss” indicates the removal or mortality of tree canopy cover and can be due to a variety of factors, including mechanical harvesting, fire, disease, or storm damage. As such, “loss” does not equate to deforestation.

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Hansen Forest Cover Gain 2000-2012: Thailand, Vietnam, Laos, Cambodia, Myanmar

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Thông tin khác

Miền	Giá trị
Loại chủ đề của bộ dữ liệu	Environment and natural resources Forest classifications Forest cover Forest policy and administration Forests and forestry SDG15 Life on Land
Ngôn ngữ	Tiếng Anh
Hạn chế truy cập và sử dụng	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
Ngày tham chiếu của bộ dữ liệu	11 tháng 7, 2012
Ngày mở đầu của phạm vi tạm thời	3 tháng 2, 2000
Ngày kết thúc của phạm vi tạm thời	3 tháng 2, 2012
Cơ sở dữ liệu dịa lý	Campuchia China Lao People's Democratic Republic Myanmar Thái Lan Viet Nam
Các tọa độ ranh giới phía Tây	92.17261642300014
Các tọa độ ranh giới phía Đông.	110.00011642300014
Các tọa độ ranh giới phía Nam.	5.6100655150000875
Các tọa độ ranh giới phía Bắc.	28.548315515000088
Hệ tham chiếu không gian	WGS 84 (EPSG:4326) (CRS:84)
Độ chính xác định vị	There are no known issues with accuracy.
Tính nhất quán logic	There are no known issues with logical consistency.
Tính đầy đủ	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).
(Các) quy trình thu thập và xử lý dữ liệu	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.
(Các) nguồn	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.
Liên hệ	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/
Thông tin người tạo Metadata.	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.
Thuộc tính
Giấy phép	CC-BY-4.0
Bản quyền	Yes
Phiên bản	1.7
Các từ khóa	tree cover
Ngày đăng tải	tháng 7 9, 2015, 10:05 (UTC)
Ngày chỉnh sửa, cập nhật	tháng 12 17, 2020, 20:29 (UTC)