sampSurf (version 0.7-6)

angleGauge-class: Class "angleGauge": For Angle Gauge Sampling Methods

Description

A subclass of "'>ArealSampling" that can be used to create objects that encapsulate all the parameters necessary for, e.g., horizontal point (prism) sampling of standing trees (or downed logs).

Objects from the Class

Objects can be created by calls of the form new("angleGauge", ...), and while this is reasonable with this class because there are no graphical slots, it is still not recommended. The preferred method for creating new objects is via the angleGauge constructor.

Slots

In addition to those slots in class "ArealSampling," the following are defined…

angleDegrees:

Object of class "numeric": The gauge angle in degrees, normally in the range 0 < angleDegrees <= 6.5 degrees.

angleRadians:

Object of class "numeric": The gauge angle in radians.

diopters:

Object of class "numeric": The prism angle in diopters (Delta).

k:

Object of class "numeric": Angle gauge constant (dimensionless); i.e., \(2 \times \sin(\frac{\eta}{2})\), where \(\eta\) is angleRadians above.

prf:

Object of class "numeric": The plot radius factor; English=ft/in, metric=m/cm.

PRF:

Object of class "numeric" The plot radius factor; English=ft/ft, metric=m/m.

alpha:

Object of class "numeric" The plot radius proportionality constant; English=ft/ft, metric=m/m.

baf:

Object of class "numeric": The corresponding basal area factor in the appropriate units; English=ft\({}^2\)/acre, metric=m\(^2\)/ha.

df:

Object of class "numeric": Diameter factor for horizontal line sampling in inches or cm.

DF:

Object of class "numeric": Diameter factor for horizontal line sampling in feet or meters.

Extends

Class "'>ArealSampling", directly.

Methods

horizontalPointIZ

signature(standingTree = "standingTree", angleGauge = "angleGauge"): Object constructor for horizontal point sampling.

summary

signature(object = "angleGauge"): Show a summary of the object.

References

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

%

See Also

The "'>ArealSampling" class.

Examples

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