lineSegment-methods: Methods for "`'>lineSegment`" object creation in Package sampSurf

Description

There is currently only one method based on the lineSegment generic that is used for object construction. It is detailed below.

Arguments

Methods

signature(length = "numeric", orientation = "numeric")

This method takes the segment length and orientation as the signature arguments along with other optional aruments described as follows…

usage…

lineSegment(length,
            orientation,
            units = 'metric',
            spUnits = CRS(projargs=as.character(NA)),
            centerPoint = c(x=0, y=0),  
            description = 'line segment',
            spID = paste('ls',.StemEnv$randomID(),sep=':'),
            ...)

length: The length of the line segment in the appropriate units (feet for “English” or meters for “metric”).
orientation: The line orientation from north as an azimuth in degrees; e.g. orientation=45.
units: Either “English” or “metric”. These must be conformable with the projection in spUnits.
spUnits: A valid CRS object specifying the Coordinate Reference System. This defaults to NA, which means you want to use your own user-defined system, say for a sample line located in the field.
centerPoint: The location of the center of the line segment in the appropriate spatial units. This should be a numeric vector of length 2 with names "x" and "y".
description: A character vector description of the tract.
spID: Each object should have its own unique identifier that is used in constructing the Lines object for the segment. This becomes very important when combining individual line segments into a population. If nothing is supplied, a random ID is generated.

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