rcaiman (version 1.2.2)

mask_hs: Mask hemisphere

Description

Given a zenith or azimuth image and angle restrictions, this function produces a mask.

Usage

mask_hs(r, from, to)

Value

An object of class SpatRaster with values 0 and 1.

Arguments

r

SpatRaster built with zenith_image() or azimuth_image().

from, to

angle in degrees, inclusive limits.

See Also

masking()

Other Segmentation Functions: chessboard(), mask_sunlit_canopy(), polar_qtree(), qtree(), rings_segmentation(), sectors_segmentation(), sky_grid_segmentation()

Examples

if (FALSE) {
z <- zenith_image(1000, lens())
a <- azimuth_image(z)
m1 <- mask_hs(z, 20, 70)
plot(m1)
m2 <- mask_hs(a, 330,360)
plot(m2)
plot(m1 & m2)
plot(m1 | m2)

# 15 degrees at each side of 0
m1 <- mask_hs(a, 0, 15)
m2 <- mask_hs(a, 345, 360)
plot(m1 | m2)

# better use this
plot(!is.na(z))
# instead of this
plot(mask_hs(z, 0, 90))
}