Rates and patterns of deforestation in the Philippines: application of geographic information system analysis
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Forest Ecology and Management. 57: 1-16.
Land-use maps for 1934 and 1988, and a 1941 road map of the Philippines were digitized into a geographic information system. These maps were then analyzed to determine the rates of deforestation and their relationship with factors such as the distance of forests to roads and forest fragmentation (measured by perimeter-to-area ratio (P/A ratio) of forest patches) for this country. The Philippines lost a total of 9.8 million ha of forests from 1934 to 1988.
Lui, Dawning S.; Iverson, Louis R.; Brown, Sandra. 1993. Rates and patterns of deforestation in the Philippines: application of geographic information system analysis. Forest Ecology and Management. 57: 1-16.