Detailed below is our approach to estimating urban tree biomass
using multiple remotely sensed data sources. We developed a multilevel
segmentation process to delineate crown and canopy area using
a combination of QuickBird imagery and LiDAR point cloud data. Direct
field measurements of tree diameters and allometric scaling were used
in conjunction with the segmented canopies to build a height-based
model of urban tree biomass. Model estimates were validated using
both open-grown and closed-canopy trees.