Abstract. Within the Strategic Plan for Forest Inventory and
Monitoring (USDA Forest Service 1998), there is a call to “conduct applied
research in the use of [advanced technology] towards the end of increasing
the operational efficiency and effectiveness of our program”. The digital
camera tree evaluation system is part of that research, aimed at
decreasing field time and increasing the informational value and
reliability of field data. Our approach started with the use of a
commercially available, non-metric digital camera for obtaining diameter
and height measurements from individual stems. The lessons learned from
these original attempts have shown that this concept is feasible, and
helped to indicate specific areas needing improvement. Methodological
improvements to be made include using convergent images and digital range
information to account for tree lean and investigation into ways to
address the faulty assumption of a circular (or elliptical) cross section.
A completely new field-ready, durable, self contained instrument is being
constructed that will digitally output image, 3 axis inclination, and
range data; and compatible software is being developed to process this
data and output information according to user requirements.