14.3. Optical remote sensing methods
A sufficient number of field measurements are a prerequisite for developing AGB estimation models and for evaluating the AGB estimation results. Numerous regression models have been developed to estimate AGB in many studies. While these models are accurate at tree, plot, and stand levels, they are limited when considering spatial pattern analysis of AGB across the landscape. However, these approaches are often time consuming, labor intensive, and difficult to implement, especially in remote areas; also, they cannot provide the spatial distribution of biomass in large areas. To scale AGB estimates to the landscape or regional level, the estimates have to be linked with remote sensing data.
The spatial coverage ...
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