map1species: Map a single species.
In forestgeo/ctfs: Tools for the Analysis of Forest Dynamics

This does the mapping for a single species, called from map() but also useful on its own.

map1species(sppdata, plotdim = c(1000, 500), xrange = c(0, plotdim[1]),
  yrange = c(0, plotdim[2]), color = "black", bgcolor = "white",
  axspos = 0.5, xaxis = TRUE, yaxis = TRUE, symbol = 16,
  size = rep(-1, 3), cutoff = c(10, 100, 300, 3000), axisdiv = 100,
  labsize = 1.75, plotside = 4, add = FALSE)

`plotdim`	The x and y dimensions of the plot.
`xrange`	Minimum and maximum x and y coordinates of area graphed. If `NULL`, all `x` (or `y`) are included.
`yrange`	Minimum and maximum x and y coordinates of area graphed. If `NULL`, all `x` (or `y`) are included.
`bgcolor`	The background color. Defaults to white. For presentation exports, try bgcolor="transparent".
`axspos`	Distance between axis numbers and axis.
`size`	The size of plotting points, to match the number of diameter breaks. If NULL, a default set is assigned. This can require fiddling, as big points do not work for really abundant species, and small points for rare species.
`cutoff`	Diameter breaks for changing size of plotting points.
`axisdiv`	the division between tick marks; must be a vector of 2, first for x ticks then for y ticks
`labsize`	Size of axis labels.
`plotside`	The vertical dimension (inches) of the map.
`add`	Logical. Whether to add elements such as points or line to an existing graph. if TRUE, there must be an appropriate existing graph, otherwise, a new graph is drawn.