angleGauge-class: Class '"angleGauge"': For Angle Gauge Sampling Methods In sampSurf: Sampling Surface Simulation for Areal 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*sin(angleRadians/2), where angleRadians 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`.

Jeffrey H. Gove

References

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

The "`ArealSampling`" class.
 `1` ```showClass("angleGauge") ```