Is this "arrow" satisfactory for you?
north.arrow = function(x, y, h) {
polygon(c(x, x, x + h/2), c(y - h, y, y - (1 + sqrt(3)/2) * h),
col = "black", border = NA)
polygon(c(x, x + h/2, x, x - h/2), c(y - h, y - (1 + sqrt(3)/2) *
h, y, y - (1 + sqrt(3)/2) * h))
text(x, y, "N", adj = c(
Hi list.
I would like to know how do I insert a North arrow, stored as a png file in
my computer, in a map? I found lots of post asking similar things, one of
them mentioned the pixmap package. The map was done using map() and
shapefiles (the code is below). Im using the pixmap () and addlogo()
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