Figure 1
From: Changes in timber haul emissions in the context of shifting forest management and infrastructure
Estimates of growing stock harvest volume using TPO records and Landsat change mapping. Landsat-based estimates were derived through the "state model differencing" (Healey et al., 2006) approach of modelling the change in a biophysical variable such as volume over time. TPO records were available for 1988, 1993, 1998, and 2004, while Landsat intervals were: 1986 to 1988, 1993 to 1995, 1997 to 1998, and 2003 to 2005. Landsat estimates represent the total mapped harvest volume divided by the number of years in the monitoring period.