sampSurf (version 0.7-6)

criticalHeightIZ-class: Class "criticalHeightIZ"

Description

This class holds the inclusion zone definition for critical height sampling for standing trees.

Objects from the Class

Objects can be created by calls of the form new("criticalHeightIZ", ...). However, this is not recommended because the objects are fairly complex. Instead, one can use the object constructor "criticalHeightIZ" to create new objects.

Slots

This class is a direct descendant of "'>horizontalPointIZ" and adds one new slot to the class definition; refer to that class description for other slots and their meanings. Please do note that the other slots listed below have slightly different meanings here…

referenceHeight:

Object of class "character": The reference height at which the inclusion zone is determined. It can be either "butt" for the base of the tree, or "dbh" for breast height as specified in .StemEnv$referenceCHSIZ.

puaBlowup:

Object of class "numeric": The exansion factor for every tree is simply the basal area factor (BAF).

puaEstimates:

Object of class "list": Only volume may be estimated under critical height sampling, all other attribute estimates are NA.

Extends

Class "'>horizontalPointIZ", directly. Class "'>circularPlotIZ", by class "horizontalPointIZ", distance 2. Class "'>standingTreeIZ", by class "horizontalPointIZ", distance 3. Class "'>InclusionZone", by class "horizontalPointIZ", distance 4.

Methods

izGrid

signature(izObject = "criticalHeightIZ", tract = "Tract"): “InclusionZoneGrid” constructor

summary

signature(object = "criticalHeightIZ"): Object summary

References

There are numerous references to critical height sampling, the following are a sample…

T. G. Gregroire and H. T. Valentine. 2009. Sampling strategies for natural resources and the environment. Chapman and Hall/CRC, 496p.

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“The InclusionZone Class” vignette.

See Also

See also the "'>circularPlotIZ" and "'>horizontalPointIZ" classes, and the "'>standingTreeIZs" container class

Examples

# NOT RUN {
showClass("criticalHeightIZ")
# }