Compute the area corresponding to a given number of cells.

Compute the area corresponding to a given number of cells.

Usage

nb_cell_to_area(raster_layer, nb_cells, unit = "ha")

Arguments

raster_layer

terra::rast() Raster object.

nb_cells

numeric Number of raster cells.

unit

unit object or a character that can be coerced to a unit (see unit package). Must be an area unit.

Value

numeric The area corresponding to nb_cells in the desired unit.

Details

The input raster must have a projected coordinate system. The distortion is not corrected. It could be using the cellSize function of the terra package, but this function is currently pretty slow for large rasters. If your problem is at regional scale, the distortion should be negligible. However, at larger scales, the best is to use an equal-area projected coordinate system.

Examples

if (FALSE) { # \dontrun{
habitat_data <- rast(
  system.file("extdata", "habitat_hi_res.tif", package = "restoptr")
)
nb_cell_to_area(habitat_data, 20, unit = "ha")
} # }