The study looked at how different methods of estimating forest productivity can affect the calculation of carbon stocks in a Douglas-fir forest in British Columbia. By comparing traditional forest inventory data with data from light detection and ranging (LIDAR), researchers found significant differences in site index estimates and biomass calculations. While LIDAR-derived estimates were generally close to the original estimates, there were some notable discrepancies. Overall, the study showed that LIDAR can be useful for improving site index estimation and mapping biomass in certain situations.