axis with degrees

draw axes on a plot using degree symbols in numbers

degAxis(side, at, labels, ...)

Arguments

side	integer; see axis
at	numeric; if missing, axTicks is called for nice values; see axis
labels	character; if omitted labels are constructed with degree symbols, ending in N/S/E/W; in case of negative degrees, sign is reversed and S or W is added; see axis
...	passed to the actual axis call

Value

axis is plotted on current graph

Note

decimal degrees are used if variation is small, instead of minutes and seconds

Examples

xy = cbind(x = 2 * runif(100) - 1, y = 2 * runif(100) - 1)
plot(SpatialPoints(xy, proj4string = CRS("+proj=longlat +ellps=WGS84")),xlim=c(-1,1),ylim=c(-1,1))
#> Warning: Discarded datum Unknown based on WGS84 ellipsoid in CRS definition
degAxis(1)
degAxis(2, at = c(-1,-0.5,0,0.5,1))
#