Forest inventory and analysis: Norhtern research station measurement error,

1. Forest inventory and analysis:
Northern research station measurement error
Alex Young, Gretchen Dillon, Ruth Yanai

2. Yanai et al. 2018 Ecosystems

3. Calculating measurement error

4. Calculating measurement error

5. Can we explain any pattern in tree diameter errors?

8. Production crews
are penalized for
being more than
one class off

9. Implications for Making Improvements
• There may be bias in tree grade due to the penalty for observations
more than one “class” off.
• We have shown measurement error magnitude, but the most
uncertain measurements may not be the most important.
•To see which measurements are most important to improve, we will
propagate these errors in calculations of FIA data products (e.g.
timber volume, C storage)

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www.quantifyinguncertainty.org
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