Create a stereographic projection base plot

Builds an empty stereonet (equal-angle or equal-area) using ggplot2, with an optional great-circle and small-circle grid. The returned ggplot object can be extended with additional layers.

Usage

ggstereo(wulff = F, show.grid = TRUE, grid.col = "grey50", tl = 0.05)

Arguments

wulff

Logical. If TRUE an equal-angle (Wulff) net is used; if FALSE (default) an equal-area (Schmidt) net is used.

show.grid

Logical. If TRUE (default) a great-circle and small-circle grid is drawn.

grid.col

Character. Colour of the grid lines. Default "grey50".

tl

Numeric. Line width (linewidth) of the grid lines. Default 0.05.

Value

A ggplot object containing the stereonet base plot.

Examples

ggstereo()

ggstereo(wulff = TRUE, grid.col = "grey70", tl = 0.1)

ggstereo(show.grid = FALSE)