West Africa Coastal Vulnerability Mapping: Deforestation, 2000-2012

The West Africa Coastal Vulnerability Mapping: Deforestation, 2000-2012, layer was created from the Global Forest Change data set which represents global tree cover extent, loss, and gain mapped for the period from 2000 to 2012 at a spatial resolution of 30m, with loss allocated annually. The Global Forest Change data set defines trees as all vegetation taller than 5m in height. Forest loss (deforestation) is defined as a stand-replacement disturbance, or a change from a forest to non-forest state. The data on forest loss were aggregated to a one kilometer resolution and subsetted to 200 kilometers from the coast to produce this data set. Raster values represent the percentage of the grid cell area that experienced forest cover loss from 2000 to 2012.

《西非沿海易损性制图：2000-2012年森林砍伐》图层是由全球森林变化数据集制作而成，该数据集展现了2000年至2012年间全球树木覆盖范围的拓展、损失与增益，以30米的空间分辨率进行映射，且损失数据按年度分配。全球森林变化数据集将树木定义为所有高度超过5米的植被。森林损失（森林砍伐）被定义为植被群落的替换性干扰，或从森林状态转变为非森林状态的变化。森林损失数据被汇总至一公里分辨率，并从海岸线向外缩减至200公里以生成本数据集。栅格值代表从2000年至2012年期间，网格单元面积中遭受森林覆盖损失的比例。