Usage
TT.contour(geo, x, add = FALSE, tri.sum.tst = NULL, tri.pos.tst = NULL, text.tol = NULL, unit.ps = NULL, unit.tx = NULL, b.lim = NULL, l.lim = NULL, main = NULL, new.mar = NULL, bg = NULL, fg = NULL, col = NULL, cex.main = NULL, lang = NULL, nlevels = 10, levels = NA, labels = NULL, xlim = NA, ylim = NA, zlim = NA, labcex = 1, drawlabels = TRUE, method = "flattest", axes = TRUE, frame.plot = NA, lty = NA, lwd = NA, blr.clock = NULL, tlr.an = NULL, blr.tx = NULL, text.sum = NULL, base.css.ps.lim = NULL, ...)