VRIVolTree: Calcualte tree volume-VRI specific
In bcgov/BCForestGroundSample: BC forest ground sample compilation

Description Usage Arguments Value Author(s)

This function use BEC(or FIZ) and species-specific taper equation to calculate tree volume. Before calculation, the function adjusts height for broken top trees: scenario 1 (D scenario): availability of DBH, DIB at broken height; scenario 2 (H scenario): availability of projected tree height in the field. This functions also assigns the volume multiplier adjustment. The function is equivalent to vir_vol_tree_2011 macro in orignal SAS compiler.

1 2	VRIVolTree(treeData, equation, logMinLength, stumpHeight, breastHeight, UTOPDIB)

`treeData`	data.table, An output from `VRIInit_measuredTree` function, i.e., vi_c data.
`equation`	character, Specifies which taper equation form will be used to calculate diameter inside bark for a given height. Must be either KBEC or KFIZ3. If missing, default is KBEC
`logMinLength`	numeric, Specifies a minimum length for a log.
`stumpHeight`	numeric, Specifies stump height. If missing, 0.3 m will be used.
`breastHeight`	numeric, Specifies breast height. 1.3 m will be used when this arguement is missing.
`UTOPDIB`	numeric, Specifies minimum merchantable inside bark diameter. 10 cm is used as a default.