Establishing a Global Forest Monitoring Capability Using Multi-Resolution and Multi-Temporal Remotely Sensed Data Sets
Results from time-series analysis of 654,178 Landsat images in characterizing forest extent and change, 2000–2012. Trees are defined as all vegetation taller than 5m in height and are expressed as a percentage per output grid cell as "2000 Percent Tree Cover". "Forest Loss" is defined as a stand-replacement disturbance, or a change from a forest to non-forest state. ‘Forest Gain’ is defined as the inverse of loss, or a non-forest to forest change entirely within the study period. "Forest Loss Year" is a disaggregation of total "Forest Loss" to annual time scales. Reference 2000 and 2012 imagery are median observations from a set of quality assessment-passed growing season observations.