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Convert raster map into binary (1/0)

Source: R/Spat_RastPA.R
RastPA.Rd

This function converts raster values into a binary format where positive values are set to 1 (presence) and zeros remain 0 (absence). Additionally, it allows for the conversion of NA values to 0, and/or 0 values to NA, based on the user's choice.

Usage

RastPA(x = NULL, NA_to_0 = TRUE, Zero_to_NA = FALSE)

Arguments

x

The input raster map. It must be of class PackedSpatRaster, RasterLayer, or SpatRaster. This parameter cannot be NULL.

NA_to_0

A logical value indicating whether NA values should be converted to 0. Defaults to TRUE.

Zero_to_NA

A logical value indicating whether 0 values should be converted to NA. Defaults to FALSE.

Value

A raster map where values have been converted according to the specified parameters. This object is of the same class as the input object.

Author

Ahmed El-Gabbas

Examples

IASDT.R::LoadPackages(List = c("dplyr", "raster", "ggplot2", "tidyterra"))

r <- raster::raster(system.file("external/test.grd", package = "raster"))

ggplot2::ggplot() +
  tidyterra::geom_spatraster(data = terra::rast(r), maxcell = Inf) +
  ggplot2::theme_minimal()


R2 <- raster::stack(
  # NA replaced with 0
  RastPA(x = r),
  # NA is kept as NA
  RastPA(x = r, NA_to_0 = FALSE),
  # 0 replaced with NA in the second map
  RastPA(x = RastPA(r), Zero_to_NA = TRUE))

ggplot2::ggplot() +
  tidyterra::geom_spatraster(
    data = terra::as.factor(terra::rast(R2)), maxcell = Inf) +
  ggplot2::facet_wrap(~lyr) +
  ggplot2::scale_fill_manual(values = c("grey30", "red"),
    na.value = "transparent") +
  ggplot2::theme_minimal()