earnet {StratigrapheR}

Draws an equal area stereonet

Description

Draws Equal Area Stereo-Net. Lambert azimuthal Equal-Area (Schmidt) from Snyder p. 185-186 (modified from RFOC package)

Usage

earnet(
  xlim = c(-1.1, 1.1),
  ylim = c(-1.1, 1.1),
  ndiv = 10,
  col = gray(0.7),
  border = "black",
  lwd = 1,
  orientation = TRUE,
  xh = "WE",
  add = FALSE
)

Arguments

xlim, ylim

the x and y minimal limits. The actual limits can change to keep a x/y ratio of 1

ndiv

the number of intervals between each line crossing

col

the colour of the net

border

the colour of the border and crosshair

lwd

the line width

orientation

logical, whether to add captions indicating the orientation of the plot.

xh

orientation of the x axis: can be 'WE' or 'SN'. Has to be provided to earplanes and earpoints

add

logical, whether to add the circle to an existing plot

References

Snyder, John P., 1987, Map Projections-a working manual, USGS-Professional Paper, 383p. pages 185-186, RFOC package

See Also

earinc, earplanes, earpoints and zijderveld

Examples

par(mfrow = c(1,2))
earnet()
earnet(xh  = "SN")
par(mfrow = c(1,1))