REBIOMA

Forest Cover – Percentage 1950 (pfc1950.asc)
The original forest cover data was provided by Conservation International's Center for Applied Biodiversity Science (CABS). To produce the 1950's map, CABS digitized a paper version of a 1953 forest cover map produced by Humbert et al. (1965), rasterized at the same resolution as the 1970-2000 forest change map (see below). The original map was produced from aerial photographs. See Harper et al. 2007 for additional details. The 1953 study appears to have focused on mapping major forest blocks, as the map does not contain small fragments in remote areas that were present in later satellite images. We assumed that the additional small fragments present in 1970 had not grown in the intervening years, and hence any forest cover present in 1970 but absent in the 1953 map was added to the latter. To create a continuous variable matching the resolution of the other environmental layers, we summarized the data provided by CABS as percent forest cover on a 30 arc-second grid.

Forest Cover – Percentage 1970 (pfc1970.asc)
The original forest cover data was produced by Conservation International's Center for Applied Biodiversity Science (CABS), and is based on a supervised classification of Landsat data. See Harper et al. 2007 for additional details. To produce the 1970 layer, we first reclassified the data to forest/non-forest and then upscaled to 30 arc-second resolution to match the other input layers. To create a continuous variable matching the resolution of the other environmental layers, we summarized the forest/non-forest data into a percent forest variable cover on a 30 arc-second grid.

Forest Cover – Percentage 1990 (pfc1990.asc)
The original forest cover data was produced by Conservation International's Center for Applied Biodiversity Science (CABS), and is based on a supervised classification of Landsat data. See Harper et al. 2007 for additional details. To produce the 1990 layer, we first reclassified the Harper et al. dataset to forest/non-forest. To create a continuous variable matching the resolution of the other environmental layers, we summarized the forest/non-forest data into a percent forest variable cover on a 30 arc-second grid.

Forest Cover – Percentage 2000 (pfc2000.asc)
The original forest cover data was produced by Conservation International's Center for Applied Biodiversity Science (CABS), and is based on a supervised classification of Landsat data. See Harper et al. 2007 for additional details. To produce the 2000 layer in Rebioma, we first reclassified the Harper et al. dataset to forest/non-forest. To create a continuous variable matching the resolution of the other environmental layers, we summarized the forest/non-forest data into a percent forest variable cover on a 30 arc-second grid.

Forest Cover – Percentage 2005 (pfc2005.asc)
The original forest cover data was produced by Conservation International's Center for Applied Biodiversity Science (CABS), and is based on a supervised classification of Landsat data. To produce the 2005 layer in Rebioma, we first reclassified the 2005 dataset to forest/non-forest.To create a continuous variable matching the resolution of the other environmental layers, we summarized the forest/non-forest data into a percent forest variable cover on a 30 arc-second grid. This layer is not currently used in any of the modeling on the REBIOMA portal. NOTE:This dataset has not been published, and therefore is not available for download through REBIOMA - for additional details please contact CABS.