Latitude mask for polar rasters.

Latitude mask for polar projections; written by M.D. Sumner and part of the spex package.

latmask(x, latitude = 0, southern = TRUE)

Arguments

x: A raster layer.
latitude: maximum latitude (effectively a minimum latitude if southern = FALSE)
southern: flag for whether south-polar context is used, default is TRUE

if (FALSE) {
## assumes that you have already defined a raster object called 'ice'
plot(latmask(ice, -60))
}