Feature request: estimate crown canopy for CWHR attributes
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Hey @Rich Howard,
I think the ability to estimate crown canopy would be a good future feature for Assisi. In California, it's a necessary piece of determining CWHR attributes. Assisi takes inputs for calculating crown width, but those values don't seem to be exposed anywhere (correct me if I'm wrong), and even if they were, it'd be a nice attribute to estimate in SummaryByStands. A paper I have been looking at to use is Modeling conifer tree crown radius and estimating canopy cover (2000) by Samantha Gill, Greg Biging, and Ed Murphy (see attached).
Aside from crown width estimates, they developed a calibrator to account for overlap. It's a constant calibration, but maybe down the road we can attach it to between-plot variance in stem density or something.
📎 Modeling Conifer Tree Crown Radius and Estimating Canopy Cover.pdf (attachment not migrated)
Eli,A Crown Closure is calculated and saved to SummaryByStand. It is not scaled using the asymptotic exponential as in the attached paper. I have added that scale to version 2022.3.8.
It should be a simple process to calculate Crown Canopy as in the paper. Choose "Polynomial" for Crown Width method and set coefficients. Oh, and wait for version 2022.3.8 to see scaled values.😉
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