Class "circularPlot": Fixed-area Circular Plots

Description

A subclass of "ArealSampling" that can be used to create fixed-area circular plot objects for use in sampling surface simulations.

Objects from the Class

Objects can be created by calls of the form new("circularPlot", ...); however, this is not recommended due to the necessity to have the spatial representation correct. Preferably, one should use the circularPlot constructor for this class.

Slots

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

radius:

Object of class "numeric": The fixed-plot radius in the correct units. For "English" units, this would be feet, for "metric" units, meters.

area:

Object of class "numeric": The area of the plot in the correct units.

perimeter:

Object of class "SpatialPolygons": The "SpatialPolygons" object corresponding to the perimeter of the fixed-radius plot.

location:

Object of class "SpatialPoints": This is a “SpatialPoints” representation of the location of the object. In the "circularPlot" class, this is the fixed-radius plot center. It will often correspond to the location slot in the "Stem" object under sampling surface simulations. But there are exceptions: for example, under the ‘standup’ method, it will be at the large-end of the log, while under the ‘chainsaw’ method, it will be some point within the “sausage” shaped inclusion zone for protocol 1 in (Gove and Van Deusen, 2011).

spID:

Object of class "character": A unique identifier that is used in the “SpatialPolygons” representation of the object.

spUnits:

Object of class "CRS": A valid string of class “CRS” denoting the spatial units coordinate system (?CRS for more information) as in package sp.

Extends

Class "ArealSampling", directly.

Methods

bbox

signature(obj = "circularPlot"): Return the bounding box.

perimeter

signature(object = "circularPlot"): Return the perimeter object.

plot

signature(x = "circularPlot", y = "missing"): Graphical display of the object.

summary

signature(object = "circularPlot"): A summary of the object.

Author(s)

Jeffrey H. Gove

See Also

The "ArealSampling" class.

Examples

1
showClass("circularPlot")

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