Nothing
library(terra)
library(sf)
test_that("Test Viewshed Functions", {
f <- system.file("ex/elev.tif", package = "terra")
r <- rast(f)
x <- project(r, "EPSG:2169")
shape <- sf::st_as_sf(as.polygons(terra::boundaries(x)))
st_crs(shape) <- 2169
locs <- st_sample(shape, 10, type = "random")
## plot_viewshed #################
plt <- plot_viewshed(x, locs, h1 = 0, h2 = 0, plot = TRUE)
expect_s4_class(plt, "SpatRaster")
expect_true(all(range(values(plt, na.rm = TRUE)) %in% c(0, 1)))
locs <- st_sample(shape, 10, type = "random")
locs <- st_coordinates(locs)
plt <- plot_viewshed(x, locs, h1 = 0, h2 = 0, plot = TRUE)
expect_s4_class(plt, "SpatRaster")
expect_true(all(range(values(plt, na.rm = TRUE)) %in% c(0, 1)))
locs <- st_sample(shape, 10, type = "random")
locs <- as(locs, "Spatial")
plt <- plot_viewshed(x, locs, h1 = 0, h2 = 0, plot = TRUE)
expect_s4_class(plt, "SpatRaster")
expect_true(all(range(values(plt, na.rm = TRUE)) %in% c(0, 1)))
})
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